In this Act—

• " the 1951 Act" means the [1951 c. 60.] Mineral Workings Act 1951 ;

• " the 1971 Act" means the [1971 c. 71.] Mineral Workings Act 1971;

• " the fund " means the Ironstone Restoration Fund ;

• " the ironstone district " means the areas set out in Schedule 1 to this Act;

• " the Minister " means the Minister of Agriculture, Fisheries and Food;

• " restoration condition " means a condition requiring that, after operations for the winning and working of minerals have been completed, the site shall be restored by the use of any or all of the following, namely, subsoil, topsoil and soil-making material;

• " worked ironstone land" means land which has been excavated in the course of winning and working ironstone by opencast operations, and includes land on which materials extracted in the course of such operations have been deposited.