The amount of the advances which the Minister may make to the Agricultural Mortgage Corporation Limited under section 2 of the M1Agricultural Mortgage Corporation Act 1956 for the purpose of increasing its guarantee fund shall be increased by five million pounds; and accordingly in subsection (1) of that section, as amended by section 63(1) of the M2Agriculture Act 1967, for the words " twelve million pounds " there shall be substituted the words " seventeen million pounds ".