Treaty Series 1962 No. 15 — Coordination and Use of Radio Frequencies — Exchange of Notes between Canada and the United States of America (sf09051)

Arrangement B

Department of Transport — Federal Communications Commission — Federal Aviation Agency — Arrangement for the Exchange of Frequency Assignment Information and Engineering Comments on Proposed Assignments Along the Canada/United States Borders in Certain Aviation Bands

(Ottawa, March 1962)

  1. This arrangement involves assignments in the frequency bands set forth in paragraph 7 hereof.
  2. In the interest of the planned use of the spectrum, information concerning future expansions and adjustments of the service allocated these bands, in the coordination zones stipulated in the Appendices attached hereto, shall be exchanged to the maximum extent practicable.
  3. The Agency proposing to establish a new station, or to modify the basic characteristics of an existing station, shall furnish to the appropriate Agency the technical data necessary to complete coordination, in accordance with the attached Appendices.
  4. The Agency responsible for coordination shall examine the information provided and shall reply as soon as practicable advising whether or not a conflict is anticipated. If so, the detail of the conflict and the particulars of the station likely to experience interference shall be supplied. New proposals or discussions may be initiated with the object of resolving the problem.
  5. Whenever differences of opinion concerning the probability of harmful interference exist, which cannot be resolved otherwise, or in cases where the information available makes it difficult to determine whether harmful interference would be created by the proposed operation, mutual arrangement should be made for actual on-the-air tests to be observed by representatives of both the Federal Aviation Agency/Federal Communications Commission and the Department of Transport. Should harmful interference be caused to the existing station, the Agency having jurisdiction over the proposed operation should be notified promptly so that the transmissions of the interfering station may be halted.
  6. Neither the Federal Aviation Agency/Federal Communications ;Commission nor the Department of Transport shall be bound to act in accordance with the views of the other. However, to keep such instances to a minimum, each Agency should cooperate to the fullest extent practicable with the other by furnishing such additional data as may be required.
  7. The bands treated and the agreed action on each are as follows:
    Department of Transport, Federal Communications Commission, Federal Aviation Agency — Arrangement for the Exchange of Frequency Assignment Information and Engineering Comments on Proposed Assignments Along the Canada/United States Borders in Certain Aviation Bands — bands treated and the agreed action
    Frequency Band Mc/s Authorized Coordination Agencies Remarks
    U.S. Canada
    74.60–74.40 FAA DOT Coordination not required at this time
    108.0–117.975 FAA DOT See Appendix
    117.975–121.975 FAA DOT See Appendix 2
    121.975–123.075 FCC DOT Coordination not required at this time
    123.075–123.575 FCC DOT Coordination not required at this time
    123.575–128.825 FAA DOT See Appendix 2
    128.825–132.025 FCC DOT See Appendix 3
    132.025–135.0 FAA DOT See Appendix 2
    135.0–136.0 DOS DOT See Appendix 4
    328.6–335.4 FAA DOT See Appendix 1
    960.0–1215.0 FAA DOT See Appendix 1

    Note: "Coordination not required at this time" in the Remarks column indicates that the present use of these frequencies does not cause conflict in their application, either in the United States or Canada. However, authorized agencies are designated to coordinate any future use which may be capable of causing harmful interference.

Appendix 1 to Arrangement B

Radionavigation Service — Aeronautical

ILS–LOC, 108–112 Mc/s; ILS–GP, 328.6–335.4 Mc/s; VOR, 108–117.975 Mc/s;
DME, 960–1215 Mc/s.

Technical Data Required for Coordination

  1. Frequency
  2. Location name and geographical coordinates
  3. Class of emission and necessary bandwidth
  4. Transmitter mean power output (Peak for DME)
  5. Antenna azimuth and gain in the event of a directional antenna array
  6. Facility service volume in terms of altitude and radius protected

Coordination Zones

The coordination zones shall be based on the geographical separation between facilities as follows:

ILS — 100 NM of U.S./Canadian Border
VOR/DME up to 15000' — 200 NM of U.S./Canadian Border
VOR/DME up to 30000' — 300 NM of U.S./Canadian Border
VOR/DME up to 75000' — 450 NM of U.S./Canadian Border

  1. Note 1: DOT/FAA agree to exchange recapitulation records of assignments at intervals of 3 months beginning June 1, 1962.
  2. Note 2: DME channels 1 through 16 and 60 through 69 are excluded from coordination between the DOT and FAA.
  3. Note 3: The SSR frequencies 1030 and 1090 Mc/s are excluded from coordination between the DOT and FAA.
  4. Note 4: When the possibility exists that assignments outside of the normal coordination zones might result in harmful interference to the radio services of the other country due to their peculiar circumstances i.e., antenna height, power, directive arrays and abnormal service volumes, the assignment of the frequencies involved may, to the extent practicable, be the subject of special coordination by the DOT and FAA.
  5. Note 5: Coordination of airborne assignments is not required when use is an integral part of the Common Navigation System.

Appendix 2 to Arrangement B

Aeronautical Mobile (R) Service — Air Traffic Control

117.975–121.975 Mc/s; 123.575–128.825 Mc/s; 132.025–135.0 Mc/s.

Technical Data Required for Coordination

  1. Frequency
  2. Location name and geographical coordinates
  3. Class of emission and necessary bandwidth
  4. Transmitter mean power outputv
  5. Antenna gain and azimuth in the event of a directional antenna array
  6. Facility service volume and function, e.g., typical function service volumes:

    Helicopter control 30 NM up to 5000 ft.
    Local control and VFR Radar Advisory 30 NM up to 20000 ft.
    Approach control including radar 60 NM up to 25000 ft.
    Departure control including radar 60 NM up to 20000 ft.
    Basic altitude enroute 100 NM up to 15000 ft.
    Intermediate altitude enroute 100 NM up to 24000 ft.
    High altitude enroute 200 NM up to 75000 ft.

Coordination Zones

The coordination zones for low-level and high-level operations are within 400 NM and 600 NM of the border, respectively, and are predicated upon the terminal assignments being placed between 117.975–126.975 Mc/s and the enroute assignments between 126.975–135.0 Mc/s. Exceptions should be handled in accordance with Note 7.

  1. Note 1: DOT and FAA agree to exchange recapitulative records of assignments at intervals of three months commencing June 1, 1962.
  2. Note 2: The frequencies 121.5 Mc/s and 121.6 Mc/s are excluded from coordination when used for SAR and scene-of-action functions, respectively.
  3. Note 3: Coordination of airborne assignments is not required when use is an integral part of the Air Traffic Control Service.
  4. Note 4: Protection is provided for the following fixed assignments in British Columbia:

    133.65 Mc/s ± 75 kc/s
    133.77 Mc/s ± 75 kc/s
    134.43 Mc/s ± 150 kc/s

  5. Note 5: Adjacent channel protection is provided for assignments on the frequency 134.10 Mc/s ± 100 kc/s.
  6. Note 6: The frequencies 126.90, 127.10, 127.30 and 128.50 Mc/s will continue to be used by Canada for enroute operational control.
  7. Note 7: When the possibility exists that assignments outside of the normal coordination zones might result in harmful interference to the radio services of the other country due to their peculiar circumstances, i.e., antenna height, power, directive arrays and abnormal service volumes, the assignment of the frequencies involved may, to the extent practicable, be the subject of special coordination by the DOT and FAA.

Appendix 3 to Arrangement B

Aeronautical Mobile (R) Service — Enroute Operational Control

128.825–132.025 Mc/s

Technical Data Required for Coordination

  1. Frequency
  2. Location name and geographical coordinates
  3. Class of emission and necessary bandwidth
  4. Transmitter mean power output
  5. Antenna gain and azimuth in the event of a directional antenna array
  6. Level of operations:

    L-Level (ML) — below 15,000 feet
    High-Low-Level (LL) — 15,000 to 24,000 feet
    Mediumevel (HL) — above 24,000 feet

Coordination Zones

The coordination zones are within 400 NM of the border for Low-Level (LL) and Medium-Level (ML) operations and 600 NM of the border for High-Level (HL) operations, respectively. Exceptions should be handled in accordance with the provisions of Note 3.

Frequency Allotment Plans

The frequency allotment plan for the Aeronautical Mobile (R) / (Enroute) service in the band 128.825–132.025 Mc/s is shown for the United States in Attachment 1 hereto, and for Canada in Attachment 2. Case by case coordination effected subsequent to November 28, 1960, between the FCC and the DOT is a part of the attached plans.

  1. Note 1: DOC/FCC agree to exchange recapitulative records of assignments essentially within the zones specified at intervals of three months commencing June 1, 1962.
  2. Note 2: Coordination of airborne assignments is not required for enroute operational control communication assignments made in accordance with applicable rules and treaties.
  3. Note 3: When the possibility exists that assignments outside the normal coordination zones might result in harmful interference to the radio service of the other country due to their peculiar circumstances, i.e., antenna height, power and directive antenna arrays, the assignments of the frequencies involved may, to the extent practicable, be the subject of special coordination between the DOT and the FCC.

Attachment 1 to Appendix 3 of Arrangement B

Frequency Allotment Plan for the Aeronautical Mobile (R)/ (Enroute) Service for the Band 128.825–132.025 Mc/s — United States
Freq. Mc/s Area of Use Level
128.9 California, Arizona, Colorado, New Mexico, Texas, Kansas, Missouri, Illinois, Indiana, Ohio, Pennsylvania, New York and New Jersey HL
129.0 Minnesota, Indiana, Illinois, Kentucky, Ohio, Maryland, West Virginia, Pennsylvania, Virginia, New York, New Jersey, Mississippi, Connecticut, Rhode Island and Delaware HL
129.1 Oregon,Mississippi, California and Nevada LL
Indiana, Ohio, Pennsylvania and West Virginia HL
129.2 Illinois, Indiana, Michigan and Ohio HL
Florida, (International) HL
129.3 Montana, North Dakota, Wyoming, South Dakota, Nebraska, Utah, Colorado, Arizona, New Mexico, Missouri and Iowa LL
Ohio, Pennsylvania and New Jersey HL
129.35 Michigan, Wisconsin, Illinois, Indiana and Ohio ML
129.4 Montana, Idaho, Wyoming, South Dakota, Utah and Calfornia LL
Michigan, Indiana, Ohio, Pennsylvania, Maryland, West Virginia, Virginia, Kentucky, North Carolina, Tennessee and Alabama ML
129.45 Illinois, Indiana, Michigan, Ohio, Pennsylvania, Virginia and Maryland HL
129.5 New York, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, North Carolina, South Carolina, Texas, Georgia and Alabama HL
129.55 Illinois, Missouri, Tennessee, Indiana and Kentucky ML
South Carolina, Georgia and Florida HL
129.6 Michigan, Ohio, Indiana, Kentucky, Texas, Louisiana, Mississippi and Alabama ML
Oregon, Idaho, Montana, Washington, Utah and California LL
129.65 Michigan, Illinois, Indiana, Ohio, Pennsylvania, Kentucky, West Virginia, Virginia, Missouri, Tennessee, North Carolina, South Carolina, Oklahoma, Texas, Louisiana, Mississippi, Alabama, Georgia and Florida HL
129.7 Washington, California and New York, (International) HL
Missouri, Arkansas, Tennessee, Mississippi and Louisiana ML
129.75 Ohio, Kentucky, West Virginia, Virginia, Tennessee, North Carolina and South Carolina LL
129.8 Ohio, West Virginia, Virginia, Kentucky, North Carolina and Maryland LL
129.9 Minnesota, Wisconsin, Iowa, Missouri, Illinois, Kentucky, Tennessee, Nebraska, Kansas, Indiana and Louisiana LL
New York and New Hampshire (International) HL
130.0 California, Colorado, Kansas, Oklahoma, Texas, Missouri, Arkansas, Illinois, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Pennsylvania, Ohio and Michigan LL
130.1 Texas, Louisiana, Arkansas, Tennessee, Mississippi, Michigan, Ohio, West Virginia, Virginia, Maryland, Pennsylvania, New York, New Jersey and Delaware LL
130.2 California, Nevada, Utah, Colorado, Wyoming, Missouri, Illinois, Kentucky, West Virginia, Virginia, Maryland, Pennsylvania and New Jersey HL
Texas, Louisiana and Florida (International) HL
130.3 Minnesota, South Dakota, Iowa, Illinois, Colorado, Kansas, Missouri, Texas, Oklahoma, Arkansas, Louisiana, Tennessee, Kentucky, Virginia, Maryland, Pennsylvania, New Jersey and New York HL
130.4 Oregon, Idaho, Montana, Washington, California, Colorado, New Mexico, Kansas, Missouri, Michigan, Indiana and Ohio HL
New York and New Hampshire (International) HL
130.5 Illinois, Indiana, Michigan, Ohio, Pennsylvania, New York and New Jersey LL
130.6 California, Nevada, Utah, Colorado, Wyoming, Nebraska, Iowa, Illinois, New York, Delaware, Maryland, Virginia, North Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana, Texas and Pennsylvania HL
130.7 Vermont, New York, Connecticut, Massachusetts, Pennsylvania, New Jersey, Delaware, Maryland, Virginia, North Carolina, South Carolina, Georgia, Florida, Alabama, Tennessee, Kentucky, West Virginia, Ohio, Michigan, Indiana, Illinois, Mississippi, Louisiana, Texas, Washington, Oregon, California and Nevada LL
130.8 Maryland, Virginia, North Carolina, Tennessee, Georgia, Alabama, Mississippi, Louisiana and Texas HL
130.9 Vermont, Massachusetts, Connecticut, New York, New Jersey, Delaware, Pennsylvania, Maryland, Virginia, North Carolina, South Carolina, Georgia and Florida HL
Illinois LL
Kansas, Colorado, New Mexico, Oklahoma, Texas and Missouri ML
131.0 Massachusetts, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Virginia, Maryland, Illinois, Indiana, Kentucky, Tennessee, Mississippi, Alabama, Georgia and Florida HL
131.1 Ohio, West Virginia, Virginia, Maryland, Kentucky, Tennessee, North Carolina, South Carolina, Georgia and Florida HL
California, Nevada, Utah and Arizona ML
131.2 New York, Pennsylvania, Maryland, Virginia, Delaware, Indiana, Michigan, Ohio and Illinois HL
131.3 Massachusetts, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Maryland and Virginia ML
Michigan, Indiana, Illinois, Wisconsin, Iowa, Minnesota, North Dakota, South Dakota and Nebraska LL
California, Arizona, New Mexico and Texas HL
131.4 California, Nevada, Colorado, Utah, Illinois, Indiana, Michigan, Ohio, New York, Pennsylvania, Massachusetts, Connecticut, New Jersey, Delaware, Maryland, Virginia, West Virginia, Kentucky, Tennessee, Arkansas, Missouri, Oklahoma, Texas, Kansas, New Mexico and Arizona HL
131.5 New York, New Jersey, Delaware, Maryland, Virginia, West Virginia, Pennsylvania, Ohio, Michigan, Indiana, Illinois, Wisconsin, Missouri, Kansas, Oklahoma, Texas and California HL
131.6 New York, Pennsylvania, Delaware, New Jersey, Maryland, Virginia, West Virginia, Indiana, Kentucky, Ohio, Illinois, Tennessee, Missouri, Arkansas, Oklahoma and Texas HL
131.7 Oregon, Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Illinois, Ohio, Pennsylvania, New Jersey, New York, Maryland, Virginia and Michigan HL
131.8 Oregon, Washington, California, Montana, Wyoming, South Dakota, Minnesota, Wisconsin, Ohio, Pennsylvania, New Jersey, New York, Massachusetts, Connecticut and Rhode Island HL
Arkansas, Louisiana, Mississippi, Tennessee, Alabama, Georgia, North Carolina, South Carolina and Florida LL
131.85 Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut LL
131.9 Minnesota, Wisconsin, Illinois, New York, New Jersey, Delaware, Maryland, Virginia, Noth Carolina, South Carolina, Georgia and Florida HL
Washington (International) HL
Maine, New Hampshire, Vermont, Massachusetts, Connecticut, Rhode Island and New York ML
132.0 Tennessee, Missouri, Illinois, Michigan, Ohio, Pennsylvania, New Jersey, New York and Connecticut LL

Attachment 2 to Appendix 3 of Arrangement B

Frequency Allotment Plan for the Aeronautical Mobile (R) / (Enroute) Service for the Band 128.825–132.025 Mc/s — Canada
Freq. Mc/s Area of UseFootnote * Level Remarks
Eastern Great Lakes Mid Western Western
128.85 X X X X ML Replacing 128.3 Mc/s
128.95 X X X X HL  
129.05   X   X HL Pilot-Dispatch (Toronto and Vancouver)
129.1 X X X X HL Pilot-Dispatch (Except Toronto-Windsor & Vancouver)
129.2 X   X X ML  
129.3 X       LL  
129.4 X       ML Replacing 127.1 Mc/s
129.5 X X X X ML  
129.6 X       LL Replacing 128.5 Mc/s
129.7 X X X X ML Pilot-Dispatch Edmonton HL
129.9   X X X ML Great Lakes LL
130.1 X X X   LL  
130.25 X X X X HL Replacing 128.1 Mc/s
130.35   X     LL  
130.5   X   X LL  
130.65   X     LL Replacing 127.3 Mc/s
130.7 X   X   LL  
130.8 X X X X HL Replacing 128.7 Mc/s
130.9   X X X ML West of 80EW and North of 45EN
131.1 X X X X ML Replacing 128.5 Mc/s Gardiner Great Lakes LL
131.2 X       HL Replacing 127.1 Mc/s
131.4     X   LL Replacing 128.5 Mc/s
131.9 X       ML Montreal only
132.0 X       HL Pilot-Dispatch Montreal

Footnotes

Footnote 1

See page 27 for map of areas concerned.

Return to footnote * referrer

Attachment 2 to Appendix 3 of Arrangement B

Attachment 2 to Appendix 3 of Arrangement B
Attachment 2 to Appendix 3 of Arrangement B

[Description of Figure]

Appendix 4 to Arrangement B

Aeronautical Mobile (R) Service — Enroute Operational Control and Air Traffic Control

135.0–136.0 Mc/s

Technical Data Required for Coordination

  1. Frequency
  2. Location name and geographical coordinates
  3. Class of emission and necessary bandwidth
  4. Transmitter mean power output
  5. Antenna gain and azimuth in the event of a directional antenna array
  6. For air traffic control facilities the service volume and function, e.g., typical function service volumes:

    Helicopter control 30 NM up to 5000 ft.
    Local control and VFR Radar Advisory 30 NM up to 20000 ft.
    Approach control including radar 60 NM up to 25000 ft.
    Departure control including radar 60 NM up to 20000 ft.
    Basic altitude enroute 100 NM up to 15000 ft.
    Intermediate altitude enroute 100 NM up to 24000 ft.
    High altitude enroute 200 NM up to 75000 ft.

For enroute operational control functions the level of operations:

Low-Level (LL) — below 15,000 feet
Medium-Level (ML) — 15,000 to 24,000 feet
High-Level (HL) — above 24,000 feet

Coordination Zones

The coordination zone is within 600 nautical miles of the border. Exceptions should be handled in accordance with the provisions of Note 4.

  1. Note 1: DOT and FAA agree to exchange recapitulative records of assignments at intervals of three months commencing September 1, 1962.
  2. Note 2: Coordination of airborne assignments is not required when use is an integral part of the Air Traffic Control Service.
  3. Note 3: Protection is provided temporarily for the existing fixed assignments on 136.03 Mc/s in British Columbia.
  4. Note 4: When the possibility exists that assignments outside of the normal coordination zones might result in harmful interference to the radio services of the other country due to their peculiar circumstances, i.e., antenna height, power, directive arrays and abnormal service volumes, the assignment of the frequencies involved may, to the extent practicable, be the subject of special coordination by the DOT and FAA.

Arrangement C

Arrangement for Frequency Coordination of Fixed Installation Radars

(Ottawa, March 1962)

It is agreed that:

  1. Coordination shall be effected in those frequency bands used by fixed installation radars, some of which are essential to the defence of North America, whenever there is considered to be a likelihood of harmful interference. For this purpose information will be exchanged through the authorized coordination agencies, as follows:
    1. All relevant existing assignments as of the effective date of this arrangement, as soon as practicable.
    2. Current editions of the information in (a), as requested.
    3. Proposed or planned assignments as far in advance as practicable.
  2. The authorized agencies and channels through which coordination will be effected are specified in the Index to the Technical Annex. When more than one authorized coordination agency or channel is listed in that Index for a particular frequency band, military matters shall be coordinated through the authorized military agencies or channels and civil matters through the authorized civil agencies or channels indicated for that band.
  3. Detailed characteristics of transmitting and receiving equipment, for both radar and any relevant non-radar equipment, will be exchanged in advance of the coordination referred to above. The minimum desirable information is as follows:
    1. Frequency band or operating frequencies
    2. Location name and geographical coordinates
    3. Site elevation above sea level and antenna height above ground
    4. Class of emission and necessary bandwidth
    5. Power (peak) delivered to the antenna
    6. Function
    7. Antenna gain and orientation
  4. Until the bands covered by this arrangement have been cleared of potential conflicts, at installations where there is a possibility of harmful interference, evaluation testing of radar installations will be carried out at the time of activation and maximum cooperation will be extended in obtaining the best engineering solution to any harmful interference problems. It is recognized that special problems exist in bands presently in use for non-radar purposes. These problems require continuous further study as regards both the procedures and the necessity of allocation adjustments so as to accommodate radars essential to the defence of North America.
  5. Radar assignments in use on the effective data of this arrangement are not subject to further coordination by virtue of this arrangement.
  6. Mobile radar adjustments are not subject to this arrangement.

Arrangement D

Arrangement Between the Department of Transport and the Interdepartment Radio Advisory Committee for the Exchange ofFrequency Assignment Information and Engineering Comments on Proposed Assignments Along the Canada-United States Borders in the Frequency Band 162–174 Mc/s

(Adopted Washington D.C., June 1956; Revised Ottawa, March 1962)

  1. This arrangement provides for the exchange of frequency assignment information and engineering comments on proposed assignments in the 162–174 Mc/s frequency band along the Canada-United States Borders.
  2. This arrangement applies in the areas bounded by:
    • Line A — Begins at Aberdeen, Wash. running by great circle arc to the intersection of 48°N., 120° W., thence along parallel 48° N., to the intersection of 95°W., thence by great circle arc through the southernmost point of Duluth, Min., thence by great circle arc to 45°N., 85°W., thence southward along meridian 85°W., to its intersection with parallel 41°N., thence along parallel 41°N., to its intersection with meridian 82°W., thence by great circle arc through the southermost point of Bangor, Me., thence by great circle arc through the southernmost point of Searsport, Me., at which point it terminates; and
    • Line B — Begins at Tofino, B.C., running by great circle arc to the intersection of 50°N., 125°W., thence along parallel 50°N., to the intersection of 90°W., thence by great circle arc to the intersection of 45°N., 79° 30'W., thence by great circle arc through the northernmost point of Drummondville, Quebec (Lat: 45° 52'N., Long: 72° 30'W.), thence by great circle arc to 48° 30'N., 70°W., thence by great circle arc through the northernmost point of Campbellton, N.B., thence by great circle arc through the northernmost point of Liverpool, N.S., at which point it terminates.
    • Line C — Begins at the intersection of 70°N., 144°W., thence by great circle arc to the intersection of 60°N., 143°W., thence by great circle arc so as to include all of the Alaskan Panhandle; and
    • Line D — Begins at the intersection of 70°N., 138°W., thence by great circle arc to the intersection of 61° 20'N., 139°W. (Burwash Landing), thence by great circle arc to the intersection of 60° 45'N., 135°W., thence by great circle arc to the intersection of 56°N., 128°W., thence south along 128° meridian to Lat. 55°N., thence by great circle arc to the intersection of 54°N., 130°W., thence by great circle arc to Port Clements, thence to the Pacific Ocean where it ends.
  3. Current records of frequency assignments in the frequency band 162–174 Mc/s will be exchanged as required.
    1. Before either Agency takes final action on any proposal for the use of any frequency in the band 162–174 Mc/s in the areas stipulated herein involving power in excess of five (5) watts, it will refer the pertinent particulars of the proposed assignment in the form shown in the appropriate Appendix hereof, to the other Agency for comment on whether the granting of an authorization will be liable to result in the causing of harmful interference to any existing radio operations of the Agency whose views are sought.
    2. If adverse comment is not received within thirty (30) calendar days from the date of the receipt of the proposal, the initiating Agency may go ahead with the operation after having notified the other Agency. In an emergency, coordination may be effected after the assignment is put into operation.
    3. Neither the Interdepartment Radio Advisory Committee nor the Department of Transport shall be bound to act in accordance with the views of the other. However, to keep such instances to a minimum, each Agency should cooperate to the fullest extent practicable with the other by furnishing such additional data as may be required.
  5. In cases where the information available makes it difficult to determine whether harmful interference would be created by the granting of a particular authorization, arrangements may be made for actual on-the-air tests to be observed by representatives of each Agency and further exchanges of engineering comments following such tests.
  6. In the interest of planned use of the spectrum, information about future expansions and adjustments of the services allocated the use of the band 162–174 Mc/s, in the areas stipulated herein, may be exchanged to the maximum extent practicable.
  7. Where a previously coordinated frequency assignment is in use and an additional assignment is proposed for the same frequency in the same area, the additional assignment must also be coordinated, attention being drawn to the previous coordination. This does not apply to the addition of mobile units to a previously coordinated land mobile system.

Appendix 1 to Arrangement D

Appendix 1 to Arrangement D
Appendix 1 to Arrangement D

[Description of Figure]

Appendix 2 to Arrangement D

Appendix 2 to Arrangement D
Appendix 2 to Arrangement D

[Description of Figure]

Image Descriptions

Attachment 2 to Appendix 3 of Arrangement B

This figure depicts a map of Canada divided into four regional areas, used to describe the frequency allotment plan and division of frequencies within Canada, as listed in Attachment 2 to Appendix 3 of Arrangement B. The Eastern area encompasses all the maritime provinces and most of the province of Quebec, bounded on the west by the meridian at approximately 76° 30’ west longitude. The Great Lakes area covers most of the province of Ontario, bounded between the meridians at approximately 76° 30' west longitude and approximately 90° west longitude. The Midwest area encompasses the provinces of Manitoba and Saskatchewan. The Western area encompasses the provinces of Alberta and British Columbia.
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Appendix 1 to Arrangement D

Appendix 1 provides a representation of a formatted letter to the U.S. Executive Secretary of the Interdepartment Radio Advisory Committee, which was to be used by the Canadian Department of Transport to provide information regarding the technical particulars of a proposed Canadian radio station in accordance with Section 4a of Arrangement D.
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Appendix 2 to Arrangement D

Appendix 2 provides a representation of a formatted letter to the Canadian Department of Transport which was to be used by the U.S. Executive Secretary of the Interdepartment Radio Advisory Committee to provide information regarding the technical particulars of a proposed U.S. radio station in accordance with Section 4a of Arrangement D.
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