# Interim Sharing Arrangement between the Canadian Department of Industry, the National Telecommunications and Information Administration, and the Federal Communications Commission Concerning the Use of the Band 220 to 222 MHz along the United States-Canada Border

## Annex B

When an Administration assigns its own primary use frequencies within 120 km of the United States-Canada border, such use shall be authorized subject to the effective radiated power (ERP) and antenna height limits specified below:

1. In the 220–221 MHz band, the maximum ERP, except as noted below, shall be determined by the following table:

Table 1
Antenna Height Above
Average Terrain (Meters)
ERP (Watts)
Up to 150 500
Above 150 to 225 250
Above 225 to 300 125
Above 300 to 450 60
Above 450 to 600 30
Above 600 to 750 20
Above 750 to 900 15
Above 900 to 1,050 10
Above 1,050 5
1. Low power channels:

Stations transmitting on the lower frequencies of channels 196 through 200 are limited to a maximum ERP of 2 watts and a maximum antenna height of 6.1 meters above average terrain.

2. Station location limitations:

The maximum ERP for stations located 6 kilometers or less from the border transmitting on the lower frequencies of channels 161 through 195 must be in accordance with Table 2Footnote 11, unless otherwise provided for by special agreement.  This table does not apply to the low power channels (196 – 200).

In Canada, for radio amateur use, channels may be aggregated.  The maximum ERP allowable per 5 kHz, in any one 5 kHz, shall be the applicable maximum ERP depending on Antenna Height Above Average Terrain described in Table 1 of Annex B.

Table 2
Distance from border
(km)
ERP
(watts)
Less than 0.3 Operations not permitted
0.3 – 0.5 5
0.5 – 0.6 10
0.6 – 0.8 20
0.8 - 2.0 25
2.0 – 4.0 50
4.0 – 5.0 100
5.0 – 6.0 200
beyond 6.0 500

2. In the 221–222 MHz band, the maximum effective radiated power allowable for mobile units shall be 50 watts.  Portable units are considered mobile units.  Fixed stations transmitting in this band are permitted up to 50 watts ERP using an antenna with a maximum height of 7 meters above average  terrain.  Transmissions from antennas that are higher than 7 meters above average terrain will be permitted if the effective radiated power is reduced below 50 watts ERP by ${20\mathrm{log}}_{10}\left(h}{7}\right)\mathrm{dB}$.  In Canada, for radio amateur use, the maximum ERP allowable shall be 50 watts per 5 kHz in any one 5 kHz, e.g. over a 20 kHz bandwidth, up to 200 W ERP would be allowed as long as the spectral power flux density does not exceed 50 W per 5 kHz in any 5 kHz.  Such transmissions from antennas that are higher than 7 meters above average terrain will be permitted if the effective radiated power is reduced below 50 watts per 5 kHz by ${20\mathrm{log}}_{10}\left(h}{7}\right)\mathrm{dB}$.  (Note: h is the height of the antenna above average terrain, in meters.)

## Footnotes

Footnote 11

The maximum ERP for these stations can not be greater than the maximum ERP determined by their antenna height above average terrain.