(a) Compliance by existing sources with categorical pretreatment standards shall be within three years of the date the standards are effective unless a shorter compliance time is specified in the appropriate subpart of 40 CFR Chapter I, Subchapter N.
(b) Existing sources which become industrial users subsequent to promulgation of an applicable categorical pretreatment standard shall be considered existing industrial users, except where such sources meet the definition of a new source.
(c) New sources shall install and have in operating condition and shall start up all pollution control equipment required to meet applicable pretreatment standards before beginning to discharge. Within the shortest time feasible (not to exceed ninety days). New sources shall meet all applicable pretreatment standards.