Users subject to National Categorical Pretreatment Standards (NCPS) as contained in 40 CFR Chapter I, Subchapter N, Part 405-471, shall comply with the standards and applicable reporting requirements under 40 CFR 403.12. New sources of categorical discharge shall meet NCPS in the shortest feasible time but in no case longer than 90 days from the commencement of discharge. Failure to comply shall be a violation of this chapter and subject the user to enforcement action. The WRA or City shall notify all known affected categorical users of the applicable reporting requirements under 40 CFR 403.12. Failure to notify the user shall not relieve the user of the duty, if any, to comply with NCPS.