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Use Group X consists of uses engaged in the mechanical, physical, or chemical transformation of materials into new goods. The provisions regulating uses classified in this Use Group are set forth as follows:

1. Section 42-201 (Use Group X – general use allowances) which includes the compilation of uses in the Use Group table; and
2. Section 42-202 (Use Group X – uses subject to additional conditions) for additional conditions that apply to certain uses, as denoted with a “P” in the Use Group table.

The provisions of Section 42-202, except as otherwise specified in such Sections, may be modified by special permit of the Board of Standards and Appeals, in accordance with Section 73-211 (Production uses), or by special permit of the City Planning Commission, in accordance with Section 74-211 (Production uses).