21.3. Notwithstanding section 2, 5, 7, 9, 10, 11 and 14 to 17, where the acquisition or lease of the economic farm in respect of which an application for a grant is made occurs before 15 March 1979, the maximum grants provided for in sections 2, 5, 7, 10, 11, 16 and 17 and the maximum amount contemplated in section 9 must be the same as those existing under the said sections before that date and, in such case, sections 21.1 and 21.2 do not apply.