http://www.legislation.gov.uk/nisi/1983/150/article/8The Quarries (Northern Ireland) Order 1983texttext/xmlenStatute Law Database2016-03-02Expert Participation2012-04-01Provisions as to safetyObservance of directions8F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .