§ 1.4
Zone Group Classification
1.4 ZONE GROUP CLASSIFICATION Whenever the terms R, V, C, HC, MU, LI, I, PCD, PCDB, and PD Zones are used, they shall be deemed to refer to all zones containing the same letters in their names; e.g., R Zones shall include OS, R-200, R-80, R-Med, R-20, R-20 MA , and R-20M Zones.