40 C.F.R. § 22.2
Use of number and gender
As used in these Consolidated Rules of Practice, words in the singular also include the plural and words in the masculine gender also include the feminine, and vice versa, as the case may require.
As used in these Consolidated Rules of Practice, words in the singular also include the plural and words in the masculine gender also include the feminine, and vice versa, as the case may require.