The state building code council shall maintain the state energy code for residential structures in a status which is consistent with the state's interest as set forth in section 1, chapter 2, Laws of 1990. In maintaining the Washington state energy code for residential structures, beginning in 1996 the council shall review the Washington state energy code every three years. After January 1, 1996, by rule adopted pursuant to chapter
34.05 RCW, the council may amend any provisions of the Washington state energy code to increase the energy efficiency of newly constructed residential buildings. Decisions to amend the Washington state energy code for residential structures shall be made prior to December 1 of any year and shall not take effect before the end of the regular legislative session in the next year.