Any supplementary technical information submitted after the filing date of the application will be added to the part of the file which is open to public inspection, unless excluded from public inspection pursuant to Rule 144(d). From the date on which the information is added to the open part of the file, it forms part of the state of the art within the meaning of Art. 54(2).

Where a technical feature was clearly disclosed in the original application but its effect was not mentioned or not mentioned fully, yet it can be deduced without difficulty by a person skilled in the art from the application as filed, subsequent clarification of that effect in the description does not contravene Art. 123(2).

Chapter H‑V provides additional guidance and examples relating to a number of typical situations where compliance with Art. 123(2) and/or Art. 123(3) is an issue. However, it must be borne in mind that the allowability of a specific amendment is ultimately to be decided on a case-by-case basis.

In limitation proceedings there is no examination as to why a request for limitation was filed or whether the goal of the limitation has been achieved, for example if the amended and limited claims are truly novel vis-à-vis a particular prior art document.

In general there is no need to verify whether the limited claims contravene any of Art. 52 to Art. 57.

It is also to be verified that the amended claims are in conformity with Art. 84.