Where—
a lease of a house, granted otherwise than in pursuance of the provisions of part V (the right to buy) relating to shared ownership leases, contains a provision to the like effect as that required by paragraph 1 of Schedule 8 (terms of shared ownership lease: right of tenant to acquire additional shares), and
a housing authority (other than the Homes and Communities Agencyor the Greater London Authority) has, in the exercise of any of its powers, left outstanding or advanced any amount on the security of the house.
that power includes power to advance further amounts for the purpose of assisting the tenant to make payments in pursuance of that provision.
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