Rules of regulatory construction.

(a)As used in this part:#

(1)Includes means including but not limited to;#

(2)May means is permitted to or is authorized to;#

(3)May not means is not permitted to or is not authorized to; and#

(4)Shall or must is used in the mandatory and imperative sense.#

(b)In this part:#

(1)Words importing the singular include the plural; and#

(2)Words importing the plural include the singular.#