If a demand for international preliminary examination under Chapter II PCT is or will be filed, any response to the WO-ISA must be submitted to the IPEA in the form of amendments and/or arguments under Article 34 PCT as part of the preliminary examination procedure (see points 358359 ff).
WIPO PCT Guide 7.030
Source: http://www.epo.org/applying/international/guide-for-applicants/html/e/ga_c_ii_12.html
Date retrieved: 24 November 2017