(1) Rules adopted December through May become effective July 1.

(2) Rules adopted June through November become effective January 1.

(3) The commission may specify earlier or later effective dates. The earliest a rule may become effective is thirty-one days after filing with the code reviser's office as explained in RCW 34.05.380(3).

(4) Rules adopted under emergency rule making must specify an effective date as explained in RCW 34.05.350.