Section 63L(1) in The West Bengal Factories Rules, 1958
(1)In any Factory carrying on a 'hazardous process' there shall be provided and maintained in good condition, a suitably constructed ambulance van equipped with items as per sub-rule (2) and manned by a full time driver-cum-mechanic and a helper trained in first-aid, for the purposes of transportation of serious cases of accidents or sickness. The ambulance van shall not be used for any purpose stipulated herein and will normally be stationed at or near the Occupational Health Centre. Provided that a factory employing less than 250 workers, may make arrangements for procuring such facility at short notice from a nearby hospital or other places, to meet any emergency.