In order to carry out the purposes and provisions of this Resolution, the uses within buildings or other structures as well as the open uses of zoning lots, or portions thereof, have been classified and combined into 10 separate Use Groups with similar characteristics. For the purposes of establishing permitted uses in this Resolution, references to permitted uses in the Use Groups, or any sub-categories therein, shall include all accessory uses thereto. Use Groups I, II, III, IV, V, VI, VII, VIII, IX and X, are permitted in Manufacturing Districts subject to the provisions of the following Sections:

1. Sections 42-11 (Use Group I – Agriculture and Open Uses) through 42-20 (Use Group X – Production Uses) establish general use allowances in Use Groups I through X, including each use listed separately therein, by Manufacturing District, and additional provisions for certain uses, where applicable.
2. Section 42-30 (SPECIAL PROVISIONS APPLICABLE TO CERTAIN AREAS AND DISTRICTS) sets forth special provisions applicable to:
   1. railroad or transit air space, as set forth in Section 42-31 (Use of Railroad or Transit Air Space);
   2. certain Manufacturing Districts, including:
      1. M1-1D, M1-2D, M1-3D, M1-4D and M1-5D Districts, as set forth in Section 42-321 (Residential uses in M1-1D through M1-5D Districts);
      2. M1-6D Districts, as set forth in Section 42-322 (Use regulations in M1-6D Districts);
      3. M1-5M and M1-6M Districts, as set forth in Section 42-323 (Use regulations in M1-5M and M1-6M Districts);
      4. M1-1, M1-5 and M1-6 Districts in certain areas, as set forth in Section 42-324 (Use regulations in certain M1-1, M1-5 and M1-6 Districts);
      5. M1-5B Districts, as set forth in Section 42-325 (Use regulations in M1-5B Districts); and
      6. Manufacturing Districts with an A suffix, as set forth in Section 42-326 (Use regulations in Manufacturing Districts with an A suffix).
3. Section 42-40 (PERFORMANCE STANDARDS) establishes performance standards that are applicable to certain uses listed in Use Groups I, IV, VI, VIII, IX and X.
4. Section 42-50 (SUPPLEMENTARY USE REGULATIONS) sets forth supplementary use regulations and special provisions applying along district boundaries, including:
   1. enclosure of commercial or manufacturing activities, as set forth in Section 42-51;
   2. enclosure or screening of storage, as set forth in Section 42-52; and
   3. limitations on business entrances, show windows or signs, as set forth in Section 42-53.
5. Section 42-60 (SIGN REGULATIONS), inclusive, sets forth regulations for permitted signs.

The use provisions of this Chapter may be modified or superseded by special rules for certain areas in Article I (General Provisions), Article VI (Special Regulations Applicable to Certain Areas), and through Special Purpose Districts.