SECTION 1.  Section 134(b) of chapter 164 of the General Laws, as as appearing in the 2018 official edition, is hereby amended by striking out the first sentence in lines 101-104 of the second paragraph and inserting in place thereof the following:

Notwithstanding any other general or special law to the contrary, the municipality or group of municipalities with a certified energy plan shall not be prohibited from proposing an energy efficiency investment plan that contains enhancements which are more specific, detailed or comprehensive or which cover additional subject areas than those contained in a jointly prepared energy efficiency investment plan submitted in accordance with section 21(b)(1) of chapter 25.  Such enhancements may be funded by any funding source authorized by section 19(a) of chapter 25.  In no event shall the department withhold approval of such enhancements due to considerations of cost efficiency or ratepayer impact if such enhancements are cost effective in accordance with the department’s cost effectiveness screening.