9-2-3: INTERPRETATION OF WORDS AND TERMS:
   A.   For the purpose of these regulations, certain terms and words are to be used and interpreted as defined hereinafter. When not inconsistent with the context, words used in the present tense include the future and words used in the singular include the plural. The word "shall" is mandatory and not directory.
   B.   Whenever the terms "dwelling", "dwelling unit", "rooming house", "rooming unit", "mobile home court", or "premises" are used in this chapter, they shall be construed as though they were followed by the words "or any part thereof". (1985 Code ch. 4 § 7-3)