(2) In particular, and without prejudice to the generality of the foregoing power, such rules may provide for all or any of the following matters, namely:--
(a) the manner in which complaint or claim referred to in sub- section (1) of section 7 shall be made;
(b) registers and other documents which an employer is required under section 8 to maintain in relation to the workers employed by him;
(c) any other matter which is required to be, or may be, prescribed.