Where—
(a) pursuant to subsection (12) of section 439 of the Maori Affairs Act 1953 (as added by section 11(2) of the Maori Purposes Act 1972), the notice constituting a Maori reservation under the said section 439 specifies that the reservation shall be held for the common use and benefit of the people of New Zealand; and
the Minister may, by agreement with the body corporate or the trustees, contribute towards the payment, out of money appropriated by Parliament for the purpose, of the whole or part of any rates from time to time levied on the land.