Energy efficiency standards on buildings; extend repealer on statute requiring certain buidlings to meet.

HB 1771 extends the expiration date of Mississippi's building energy efficiency standards, which require certain commercial, public, and institutional buildings to meet specific energy-saving design and construction requirements. The law applies to buildings with heating/cooling systems (like offices, schools, hotels, and retail stores) but excludes small, unheated structures, mobile homes, and federal properties. It delays the automatic repeal of these standards from July 1, 2029, to a later date (not specified in the text), keeping the current requirements in place. The bill does not change the standards themselves but ensures their continued application for covered buildings.