(6) Where a fee is payable to the Board in respect of an appeal to it or a request for an oral hearing of an appeal under section 66, or under section 8 of the Act of 1977, as amended, the Board shall not entertain or consider the said appeal or request until the fee is received by the Board, and where a period is prescribed for the making of such an appeal, unless the fee is received by the Board before the expiration of that period.".