Any amendments made in opposition proceedings must be occasioned by the grounds for opposition specified in Art. 100. That is to say, amendments are admissible only if they represent a genuine attempt to overcome are required in order to meet a ground for opposition. However, the ground for opposition does not actually have to have been invoked by the opponent. For example, in opposition proceedings admissibly opened on grounds of non-patentability, the patent proprietor can also submit amendments to remove added subject-matter. Opposition proceedings cannot be used merely to tidy up and improve the disclosure in the patent specification (see T 127/85). The mere addition of new claims to the claims as granted is inadmissible because such amendments cannot be said to meet a ground for opposition. However, the replacement of one independent claim as granted by multiple, e.g. two, independent claims each directed to a respective specific embodiment covered by the independent claim as granted is admissible if such a replacement is occasioned by a ground for opposition specified in Art. 100 (see T 223/97).