Every structure or group of structures and uses, and every designed plot area or cluster unit having services, facilities or utilities, in common, private usage and in common ownership or control by its occupants, or which functions as an independent corporate property owner, or agent of management, shall be located upon and within a lot or plot of land which shall be fully dimensioned and designated as representing the area of responsibility and extent of such individual or group ownership or management, as may be established by ownership in full or partial fee or lease under deed covenant, lease contract or such other conditions of usage or occupancy legally established and recorded therefore; and a description or plan of each such lot or plot shall be filed separately or as part of the descriptive maps of an M-R development with the municipal tax assessor.