Under the EPC 1973, the correction of priority declarations was allowed under R. 88 EPC 1973. The possibility to correct the declaration of priority was expressly introduced into the EPC 200 in R. 52(3) EPC.
Source: http://www.epo.org/law-practice/legal-texts/html/caselaw/2019/e/clr_iv_a_8_2_1.htm
Date retrieved: 17 May 2021