(1) Subject to subsection (1A) below, where a term of a contract, or a provision of a notice given to persons generally or to particular persons, purports to exclude or restrict liability for breach of duty arising in the course of any business or from the occupation of any premises used for business purposes of the occupier, that term or provision -

(a) shall be void in any case where such exclusion or restriction is in respect of death or personal injury;

(b) shall, in any other case, have no effect if it was not fair and reasonable to incorporate the term in the contract or, as the case may be, if it is not fair and reasonable to allow reliance on the provision.

(1A) Nothing in paragraph (b) of subsection (1) above shall be taken as implying that a provision of a notice has effect in circumstances where, apart from that paragraph, it would not have effect.

(2) Subsection (1)(a) above does not affect the validity of any discharge and indemnity given by a person, on or in connection with an award to him of compensation for pneumo¬coniosis attributable to employment in the coal industry, in respect of any further claim arising from his contracting that disease.

(3) Where under subsection (1) above a term of a contract or a provision of a notice is void or has no effect, the fact that a person agreed to, or was aware of, the term or provision shall not of itself be sufficient evidence that he knowingly and voluntarily assumed any risk.