The Secretary of State may give directions as to payments to be made under general ophthalmic services contracts.
A general ophthalmic services contract must require payments to be made under the contract in accordance with directions under this section.
A direction under subsection (1) may in particular—
Before giving a direction under subsection (1), the Secretary of State—
"Payments" includes fees, allowances, reimbursements, loans and repayments.