A.   Any gender includes the other genders.
   B.   The singular number includes the plural, and the plural number includes the singular.
   C.   Words used in the present tense include the past and future tenses and vice versa unless manifestly inapplicable.
   D.   Words and phrases used in this code not specifically defined shall be construed according to the context and approved usage of the language. (1962 Code § 1-1.09)