An employer shall ensure that -
(a) lifting equipment is operated by a competent person or by a person who is under the direct supervision of a competent person for the purpose of training,
(b) no person under 18 years of age is employed to -
(i) give signals to the operator of lifting equipment driven by mechanical power or
(ii) to operate any such equipment,
(c) every signal given for directing the movement of lifting equipment -
(i) is distinctive in character, and
(ii) such that the person to whom it is given is able to hear or see it easily, and
(d) signalling devices are -
(i) properly maintained, and
(ii) the means of communication are adequately protected from accidental interference.