“Design-year usage” means the method used by the WRBP to equitably apportion operations and maintenance, administrative, and replacement costs among communities.

Source. #8235, eff 12-22-04 (See Revision Note at chapter heading for Env-Wq 1200) (formerly Env-Ws 1202.16); ss by #9798, ef 10-9-10 (from Env-Wq 1202.15); ss by #12739, eff 3-19-19