In all districts, non-conforming building materials or contractors' yards, or non-conforming junk or salvage yards, including auto wrecking or similar establishments, or non-conforming scrap metal, junk, paper or rags storage, sorting or baling may be continued subject to the applicable provisions set forth herein, whichever impose the greater restriction.

(a)        In Residence Districts, where such use constitutes a non-conforming use of land with minor improvements, the provisions of Section 52-72 (Land With Minor Improvements) apply.

(b)        In Residence Districts, where such use constitutes a use other than a use of land with minor improvements, and meets the criteria set forth in Section 52-74 (Uses Objectionable in Residence Districts), the provisions of Section 52-74 apply.

(c)        In all districts where such use is non-conforming with respect to the required enclosure as set forth in the listing of such use in Section 42-19 (Use Group IX – Storage) and is either conforming or non-conforming in other respects, it may be continued without such enclosure until a date three years from February 8, 1968, or from such later date that the use becomes non-conforming. Thereafter, any such use which does not conform with the enclosure requirements shall be terminated, and the land shall be used only for a conforming use.