Where certain subject-matter is clearly disclosed in a claim of the application as filed, but is not mentioned anywhere in the description, it is permissible to amend the description so that it includes this subject-matter. Where the claim is dependent, it may suffice if it is mentioned in the description that the claim sets out a particular embodiment of the invention (see F‑II, 4.5).
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/f_iv_6_6.htm
Date retrieved: 17 May 2021