For electioneering communications and other political advertising, "periodical" means a digital or paper publication that is serial in nature and appears or is intended to appear indefinitely, issued regularly or at stated intervals at least once every three months.
Wash. Admin. Code § 390-05-520
Statutory Authority: RCW 42.17A.110 and 42.17A.320. 13-12-017, § 390-05-520, filed 5/24/13, effective 6/24/13. Statutory Authority: RCW 42.17.370 and 42.17.562. 06-11-132, § 390-05-520, filed 5/23/06, effective 6/23/06.