(1) Wherever reference is made to gender, gender includes the masculine, feminine, and neutral genders.

(2) The singular shall include the plural and the plural shall include the singular.

(3) Present tense shall include the past and the future tenses and vice versa unless stated otherwise or manifestly inapplicable.

(4) Whenever any act or omission is made unlawful by the District Code, it shall include causing, allowing, permitting, aiding, abetting, suffering, or concealing the fact of such act or omission.

(5) Whenever a time within to act is set forth in the District Code, the time shall be computed by excluding the first day and including the last day, unless the last day is a Saturday, Sunday, or a holiday, in which case the last day shall be the next regular business day. [Res. 780 § 4, 2019.]