Governor Baker signed into law Chapter 75 of the Acts of 2016 on April 11, 2016. The act included an emergency preamble that was adopted through separate, unanimous votes of the members present and voting in both the House and Senate on April 7th. This was confirmed through Clerks' offices and the journals of both houses.
Sections 5 & 6 of the Act, which clearly specify that the net metering capacity limits should be raised, should have taken immediate effect on April 11, 2016.