70.—A planning authority which serves a notice under section 59(1) in respect of a protected structure may—

(a) recover (whether as a simple contract debt in a court of competent jurisdiction or otherwise), from the owner or occupier, any expenses reasonably incurred by the authority under section 69, including any assistance provided under section 59(2), and

(b) secure those expenses by—

(i) charging the protected structure under the Registration of Title Act, 1964, or

(ii) an instrument vesting any interest in the protected structure in the authority subject to a right of redemption by the owner or occupier.