Not more than one single-family dwelling may be placed on a lot or parcel in the residential zones, except in the R2 zone, which allows one two-family dwelling on a lot or parcel, and the DZ zone, which allows two (2) two-family dwellings per ten (10) acres according to this article and must be a master planned development as regulated by this title. Single caretaker facilities or single secondary accessory apartments may be allowed (as detailed in section 9-7B-10 of this article. (Ord. 13-01, 9-3-2013)