Under Art. 76(1), the subject-matter of a divisional application may not extend beyond the content of the parent application as originally filed. Furthermore, amendments made to the divisional application subsequent to its filing may not extend beyond the content of the divisional application as originally filed (Art. 123(2); for more details see C‑IX, 1.4).
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/h_iv_2_3_2.htm
Date retrieved: 17 May 2021