All decks or patios as described in this chapter shall comply with accessory building yard requirements for accessory buildings and with lot coverage regulations as set forth in the schedule in Section 37-63, except that for the purposes of this chapter, decks in the R-AA, R-A, R-A(PRD), R-BB and R-B zone districts shall have their own lot coverage requirements, separate and apart from the requirements for lot coverage as set forth in Section 37-63 and the schedule attached thereto. The following maximum lot coverage requirements in the R-AA, R-A, R-A (PRD), R-BB and R-B zone districts shall apply to decks: