Me. Stat. tit. 30-A § 2703
A municipality may not enact any ordinance which requires employees to reside within the boundaries of the municipality as a condition of employment, nor may collective bargaining agreements contain these strict requirements. A municipality may negotiate collective bargaining agreements or, if the municipality does not engage in collective bargaining, enact ordinances that require employees to reside within a specified distance or a specific response time of a facility where those provisions represent a legitimate job requirement, and provided that the ordinances do not apply to employees already employed when the ordinance takes effect. [1987, c. 737, Pt. A, §2(NEW); 1987, c. 737, Pt. C, §106(NEW); 1989, c. 6(AMD); 1989, c. 9, §2(AMD); 1989, c. 104, Pt. C, §§8, 10(AMD).]
This section applies only to public employees, as defined in Title 26, section 962, subsection 6. [1987, c. 737, Pt. A, §2(NEW); 1987, c. 737, Pt. C, §106(NEW); 1989, c. 6(AMD); 1989, c. 9, §2(AMD); 1989, c. 104, Pt. C, §§8, 10(AMD).]
30-A M.R.S. § 2703