The following shall not apply:
A. Any religious nonprofit organization, or association or society, operated, supervised or controlled by or in conjunction with a religious organization, association, or society from limiting the sale or rental of dwelling units owned and operated for other than a commercial purpose.
B. Any single-family house sold or rented by an owner, provided that such private individual owner does not own more than three (3) such single-family houses at any one time; and provided further, that only one such sale may be made within any twenty four (24) month period.
C. Any dwellings containing living quarters occupied or intended to be occupied by no more than four (4) families living independent of each other and the owner actually occupies one such living quarters as his residence. (1990 Code § 5-803)