for 10 per cent of the time or more the value of 50 microvolts per meter at the following points of measurement: in Cuba at any point east of the province of Camaguey, and in Canada at any point west of the province of Manitoba.

TABLE VIII

SPECIAL CONDITIONS AFFECTING CANADA

Nothing stated in this Agreement shall be construed to preclude Canada from asserting priority of use with reference to certain Class III and IV stations now in operation in Canada on existing clear and regional channels which through this Agreement will become of a class of channel which may not permit their use by Class III and IV stations.

• In accordance with other provisions in this Agreement this freedom of interference does not apply outside the boundaries of the country in which the station is located.

From other stations on same channel only. For adjacent channels see Appendix III, Table I.
Sky wave field intensity exceeded for 10% of the time.

No Class II station shall be assigned to the same channel as a Class I A station for nighttime operation (from sunset to sunrise) less than 650 miles of the nearest border of the country in which the Class I A station is located.

• These values are with respect to interference from all stations except Class I, which stations may cause interference to a field intensity contour of higher value. However, it is recommended that Class II stations be so located that the interference received from Class I stations will not exceed these values. If the Class II stations are limited by Class I stations to higher values, then such values shall be the standard established with respect to interference from all other classes of stations.

The undesired ground wave signal shall be measured at or within the 0.5 mv/m ground wave contour of the desired station. These values apply to all classes of stations both day and night and are based on ground waves only. No adjacent channel interference is considered on the basis of an interfering sky wave.

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