Purchase by Board of controlled station not to be closed down

Where in respect of any month notified by the Board (and hereinafter in this Schedule referred to as the relevant month), the scheduled effective capacity of the station is computed under para. X to be less than one-half of the actual effective capacity of the station, the Board may give to the licensee six months' notice in writing that on the first day of the year of the account next following the date of expiration of such notice the station will be purchased by the Board.