Chapter 159B of the General Laws is hereby amended by inserting after section 6B the following section:-

Section 6B1/2. A city or town that accepts this section may establish a reduced maximum rate for the involuntary towing away of motor vehicles within the city or town’s jurisdiction when such towing is ordered by the police or other public authority due to a parking violation during a declared snow emergency, natural disaster or extreme weather-related emergency, or state of emergency related to the threat of a natural disaster; provided, that the reduced maximum rate shall be equal to one-half of the maximum rate otherwise applicable in said city or town pursuant to section 6B. A city or town that establishes a reduced maximum rate pursuant to this section shall include, in any contract between said city or town and a tow service provider to provide tow services, a provision stating this reduced maximum rate.