232.6. Every person whose plan has been approved shall submit a revised plan to the Minister for approval
(1) every 5 years, unless a shorter period is fixed by the Minister on approving the plan or revised plan;
(2) whenever amendments to the plan are justified by changes in the mining activities;
(3) whenever he intends to amend the plan;
(4) whenever the Minister has seen fit to request a revision.
Section 232.5, adapted as required, applies to a revised plan.