Special provision for residential and rural centre and settlement zone
6.  Where any land that is intended to be developed was zoned in the 1958 Master Plan or, where applicable, the 1982 Master Plan for a residential purpose, or for the purpose of a rural centre and settlement, the formulae in rule 3(1)(a) and (b) shall apply as if all references in those formulae to floor area were substituted with references to the area obtained by multiplying the equivalent plot ratio of the land with the land area of the land.