15. The affordable dwelling equity shall be redeemed by the homeowner and realised by the housing authority by means of one or more of the following:

(a) making of redemption payments by the homeowner in accordance with section 16;

(b) payment by the homeowner following a sale of the affordable dwelling in accordance with section 17;

(c) realisation of the affordable dwelling equity by the housing authority in accordance with sections 18 and 19.