7. In regulation 10 (possession of drugs in Schedules 2, 3 and 4)—
(a)in the heading, for “and 4” substitute “, 4 and nitrous oxide”;
(b)after sub-paragraph (e) of paragraph (1), insert—
“(f)a person specified in sub-paragraph (f) of regulation 8(2) may have nitrous oxide in his possession,”;
(c)in paragraph (3), after “have” insert “nitrous oxide or”;
(d)in sub-paragraph (a) of paragraph (4), after “possession” insert “nitrous oxide or”.