7.—(1) Subject to the following provisions of this regulation and regulation 8(2) below, regulation 3 above shall not apply where a person makes silage on a farm—

(a)otherwise than in a silo;

(b)by a method differt from that described in regulation 3(1)(b) above,

and made the majority of his silage on that farm by that method in the period of 3 years immediately before 1st March 1991.

(2) A person shall not be entitled to rely on the exemption conferred by paragraph (1) above—

(a)unless he has given notice to the Authority before 1st September 1991 of his intention to do so and he keeps any crop which is being made into silage in a place at least 10 metres from any inland or coastal waters which silage effluent could enter if it were to escape;

(b)on or after 1st September 1996.