18. Every regulation or by-law in force or other act performed before 12 June 1984 under a provision replaced by this Act shall retain its effect, to the extent that it is not inconsistent with this Act, until its purpose is achieved.
Such a regulation or by-law shall be regarded as a regulation or by-law adopted under this Act and may be amended, replaced or repealed in accordance with this Act.
1984, c. 10, s. 18; 1989, c. 60, s. 11.