Municipalities of this State may adopt more stringent ordinances, laws or regulations dealing with subject matter of this chapter. Any less restrictive ordinances, laws or regulations now in effect dealing with the subject matter of this chapter and the minimum standards which it establishes are declared invalid and of no force and superseded by this chapter on September 23, 1971. [1971, c. 622, §61(AMD).]
17 M.R.S. § 2271