4. CHANGES IN RATES OR CONDITIONS

(a) The Station reserves the right to change its standard Rates or Conditions at any time, but shall give six months written notice to Advertisers who have a Booking in force at that time. The Rates payable and the Conditions applicable shall be those in force at the time of transmission, but the Advertiser concerned shall (by serving written notice to the Station within thirty days of receiving notice of such change) be entitled to cancel any Booking outstanding to which the changed Rates or Conditions would otherwise be applicable.

(b) The Station reserves the right to announce special charges and conditions which shall preempt all normal Rates and Conditions from time to time for particular programmes. Whilst the Station will give as much notice as possible to Advertisers who have a Booking in force at the time, the Station shall be under no duty to give notice. The Advertisers concerned may, subject to availability, select other times or Programmes in the same rate class.