Hong Kong Regulations

FACTORIES AND INDUSTRIAL UNDERTAKINGS (WORK IN COMPRESSED AIR) REGULATIONS - REGULATION 10

Man-lock attendants

(1) Every man-lock shall, whilst any person is employed in compressed air in
the man-lock or in a working chamber to which the man-lock affords direct or
indirect access, be under the charge of a lock  attendant and the
lock attendant shall be in attendance at the man-lock at all such times.

(2) Where persons are employed in compressed air at a pressure exceeding 14
pounds per square inch-

   (a)  the lock attendant in charge shall be a person who has completed a
        suitable training course designed to familiarize him with the problems
        associated with compression, decompression and decompression sickness
        and with the keeping of records under these regulations; and

   (b)  there shall be not less than 3 lock attendants available for duty in
        respect of each man-lock.

(3) No lock attendant shall be on duty for more than 12 hours in any 1 shift.