I'd skimmed through that and couldn't find it, think I've found it now under Section 7 (3):
"On the restructuring date the Corporation’s interests in unworked coal and coal mines, including its interests in any coal that, notwithstanding having been worked at some time, is so attached to or incorporated in any coal mine or other land as to be, in law, a part of it, shall vest without further assurance in the Authority."