18(1)The chargeable consideration for a rent to mortgage transaction is determined in accordance with this paragraph.
(2)A rent to mortgage transaction means—
(a)the transfer of a dwelling to a person, or
(b)grant of a lease of a dwelling to a person,
pursuant to the exercise by that person of the right to acquire on rent to mortgage terms under Part 5 of the Housing Act 1985 (c. 68).
(3)The chargeable consideration for a rent to mortgage transaction is equal to the price that would be payable by virtue of section 126 of the Housing Act 1985 (c. 68), for—
(a)a transfer of the dwelling to the person where the rent to mortgage transaction is a transfer, or
(b)the grant of a lease of the dwelling to the person where the rent to mortgage transaction is the grant of a lease,
if the buyer was exercising the right to buy under Part 5 of that Act.