25. Notwithstanding the fact that the lender gave his approval to the granting of a farm loan or forestry loan before 1 August 1978, such loan is, for the purposes of this Act, deemed to be granted from 1 August 1978 if the deed of loan, the note or the evidence of indebtedness evidencing the loan or, in the case of a credit opening granted under section 4 of the Act to promote credit to farm producers, the note or the evidence of indebtedness evidencing the first advance granted to the borrower, is signed on or after 1 August 1978.