4.—(1) If at any time during the pre-commencement period the employer gave notice in writing to an Article 18 company that he did not intend to propose alternative arrangements under Article 19(1) in respect of the company before 6th May 1997, no such proposals may be made in respect of the company by him or any other person before that date (and paragraph 6 does not apply to any notice given in respect of the company in the pre-commencement period).
(2) Where such a notice was given, regulation 15(2)(a) (permitted notice time for first notice of proposals of alternative arrangements) shall have effect in relation to the company with the omission of head (i) and the substitution in head (iii) for “the date applicable under head (i)” of “the commencement date”.