38.— The Minister may provide, by prison rules or otherwise, that prisoners shall pay (whether directly or by way of credit deduction) for specified goods or services requested by them that are not available without charge to prisoners generally, including—

(a) telephone calls,

(b) access to electronic devices,

(c) private medical treatment, or

(d) escorts provided outside the prison for matters not related to the imprisonment of those prisoners,

but the payments or deductions shall not exceed the full cost of providing the goods or services.