An Act relative to a tactical transition to affordable, clean thermal energy

This bill requires Massachusetts gas utilities to prioritize non-gas, clean energy alternatives (like electrified heating) over new gas infrastructure. It mandates that gas companies demonstrate all viable non-gas options were considered before expanding gas systems and prohibits rate recovery for gas infrastructure replacements after 2035. Utilities must file 5-year "tactical transition plans" detailing gas pipeline retirements, clean energy installations, and cost savings from avoiding gas projects. The law also bans hydrogen injection into residential gas systems (except for specific industrial uses) and requires cross-subsidization between gas and clean energy systems. These changes directly affect gas utilities, their customers, and building owners transitioning from gas heating.