The Minister or any other person may, in accordance with the regulations, oppose the grant of a standard patent on one or more of the following grounds, but on no other ground:
(a) that the nominated person is either:
(i) not entitled to a grant of a patent for the invention; or
(ii) entitled to a grant of a patent for the invention but only in conjunction with some other person;
(b) that the invention is not a patentable invention;
(c) that the specification filed in respect of the complete application does not comply with subsection 40(2), (3) or (3A).