The Patent Amendment Act 2005 brought about a significant inclusion to the then existent prosecution scheme by introducing the scheme of post-grant opposition. The legislation provides that a post-grant opposition as under Section 25(2) of the Patents Act 1970 may be filed within one year of the grant of the patent on the same grounds governing pre-grant oppositions as prescribed under Section 25(1). However, one of the vital differences between the two provisions rests in the locus standi of the person moving to oppose the grant of a patent: a pre-grant opposition being allowable from "any person", while only any "person interested" being entitled to file post-grant opposition.