2.1 Basic principle

The question of allowability of amendments is legally a question of whether the application as so amended is allowable. An amended application must of course satisfy all the requirements of the EPC including, in particular, inventive step and the other matters listed in B‑XI, 3.6 (see also C‑III, 2).

If, however, the applicant seeks to amend the description (other than references to the prior art), the drawings or the claims in such a way that subject-matter which extends beyond the content of the application as filed is thereby introduced, the application as so amended cannot be allowed.

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