§ 103
Zone group classification
Whenever the terms "R zone," "C zone," or "M zone" are used, they shall be deemed to refer to all zones containing the same letters in their names; e.g., C zones shall include C-1, C-2, and C-D zones.
Whenever the terms "R zone," "C zone," or "M zone" are used, they shall be deemed to refer to all zones containing the same letters in their names; e.g., C zones shall include C-1, C-2, and C-D zones.