Loss of exemption
8.—(1) A structure which is an exempt structure by virtue of regulation 6 above shall cease to be an exempt structure if—
(a)any requirement of a notice under regulation 9 below is not complied with within the period stated in the notice; or
(b)at any time on or after 1st March 1991 it is substantially enlarged or substantially reconstructed unless a contract for the work was entered into or the work was commenced before that date and in either case the work was completed before 1st September 1991.
(2) The exemption conferred by regulation 7 above shall cease if any requirement of a notice under regulation 9 below is not complied with within the period stated in the notice.
(3) Any reference in paragraphs (1) and (2) above to the period stated in a notice is to that period as extended if it has been extended under regulation 9(4) below or by virtue of regulation 10(5) below; and any reference in those paragraphs to a requirement of a notice is to that requirement as modified if it has been modified under regulation 9(4) below.