(1) The Secretary of State may by regulations require controllers to pay charges of an amount specified in the regulations to the Commissioner.
(2) Regulations under subsection (1) may require a controller to pay a charge regardless of whether the Commissioner has provided, or proposes to provide, a service to the controller.
(3) Regulations under subsection (1) may -
(a) make provision about the time or times at which, or period or periods within which, a charge must be paid;
(b) make provision for cases in which a discounted charge is payable;
(c) make provision for cases in which no charge is payable;
(d) make provision for cases in which a charge which has been paid is to be refunded.
(4) In making regulations under subsection (1), the Secretary of State must have regard to the desirability of securing that the charges payable to the Commissioner under such regulations are sufficient to offset -
(a) expenses incurred by the Commissioner in discharging the Commissioner's functions -
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