The regulations may make provision for sums paid to an administrator to be repayable, in whole or in part, to the persons by whom they were payable (“liable persons”).

The regulations may make provision as to how sums repayable under the regulations are to be calculated.

They may include provision for the sums repayable under the regulations to vary according to the extent to which, or manner in which, liable persons dispose of products or materials to which the regulations relate, or meet or contribute to their disposal costs.