5. The manager of every mine shall ensure that–
(a)before any excavation is undertaken all factors which are likely to affect the movement of the ground at that place are assessed for the purpose of identifying the ground control measures which may need to be taken in order to comply with regulation 4;
(b)the assessment is recorded in a document (referred to in these Regulations as the “assessment of ground conditions”); and
(c)the assessment of ground conditions is reviewed, and, where appropriate, revised if there is reason to suspect that there has been a material change in the matters to which it relates.