Rule 9. The extent and conditions for the purposes of sub-section (2) of section 13

In case of employees-a. Engaged in any emergency which could not have been foreseen or prevented; b. engaged in work of the nature of preparatory or complementary work which must necessarily be carried on outside the limits laid down for the general working in the employment concerned; c. whose employment is essentially intermittent; d. engaged in any work which for technical reasons has to be completed before the duty is over; and engaged in a work which could not be carried on except at times dependent on the irregular action of natural forces; the provisions of rules 6, 7 and 8 shall apply subject to the condition that –

(i) the spread over of the hours of work of the employee shall not exceed 16 hours in any day; and

(ii) the actual hours of work excluding the intervals of rest and the periods of inaction during which the employee may be on duty but is not called upon to display either physical activity or sustained attendance shall not exceed 9 hours in any day.