830. Defences in regard to offences relating to mines.

In any legal proceedings to recover damages and in any prosecution, in so far as the proceedings are or prosecution is based on an allegation of a contravention1, in relation to a mine2, of: (1) a provision of the Mines and Quarries Acts 1954 and 19693, of an order made thereunder or of regulations (except a provision which expressly provides that a person is to be guilty of an offence4); or (2) a direction, prohibition, restriction or requirement given or imposed by a notice served under or by virtue of those Acts by an inspector5; or (3) a condition