The display of flashing or steady burning lights on an obstruction during daylight hours, for the purpose of warning airmen of the presence of such an obstruction, may be prescribed under certain conditions. The foregoing day lighting is intended to provide protection in addition to that provided by the applicable marking standard hereinbefore described.
Wash. Admin. Code § 468-240-110
Statutory Authority: Chapter 47.68 RCW. 96-17-018 (Order 164), recodified as § 468-240-110, filed 8/13/96, effective 9/13/96; O.M.&L. standards (part), filed 9/13/61.