For the search practice as regards international (PCT) searches, reference is made to the PCT International Search and Preliminary Examination Guidelines, as well as to the latest version of the Euro-PCT Guide ("PCT procedure at the EPO, Guide for applicants").
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/b_ii_4_4.htm
Date retrieved: 17 May 2021