The present tense includes all other tenses; the singular includes the plural, and the plural includes the singular; the masculine gender includes the feminine and neuter; the word "used" includes the words "designed" or "arranged;" the word "person" includes any individual, estate, trust, fiduciary, partnership, association, corporation or any other organization or entity, including the principal officers thereof or any person or entity acting directly or indirectly by, through or under any of the foregoing; the word "occupied" includes the words "designed, or intended to be occupied;" the word "structure" includes "building"; the word "shall" is always mandatory; the word "may" is always permissive and the words "as amended" as applied to any statute, ordinance, code, regulation, plan or map includes replacements, supplements or restatements thereof; and reference to a particular article, section or subsection which inherently refers to other articles, sections or subsections, includes all articles, sections or subsections referred to.