Sections 7, 8, 9, 10, 11, 12, 13 and 21 shall not take effect until April 1, 1979, or before 6 months after the promulgation of a rule, as defined in section 5(6) of Act No. 306 of the Public Acts of 1969, being section 24.205 of the Michigan Compiled Laws, pursuant to section 16 of this act, whichever occurs later.