4.—(1) The amendments made by regulation 2(3) of these Regulations shall apply only in relation to a course of care and treatment commenced on or after 1st February 1992.
(2) In paragraph (1) above the expression “care and treatment” shall have the same meaning as in the 1973 Regulations.
(3) Until 1st March 1992 the new sub-paragraph (1A) (c) inserted in paragraph 5 of Schedule 1 to the 1973 Regulations by regulation 2(3) (d) of these Regulations shall have effect as if the words “and amended on 9th January 1992” were omitted.