Whenever any words in any section of this code import the plural number, the singular shall be deemed to be included, and whenever the singular number shall be used it shall be deemed to include the plural.

    Whenever the masculine gender is used in this code, females as well as males shall be deemed to be included.

    Words in the present tense shall be deemed to include the future tense.

    The word "shall" as used in this code is mandatory.