31. Forms relating to the receiving Office are contained in Part I of Annex A to the Administrative Instructions. The request form (Form PCT/RO/101) is available in Part V of Annex A to the Administrative Instructions. Among those forms for use by the receiving Office, those whose use is mandatory are listed in Section 102(a)(ii). The language of the forms used by the receiving Office must, in general, be the same as the language in which the international application is filed. However, where the international application is to be published in the language of a translation required under Rule 12.3(a) or 12.4(a), the receiving Office shall use the forms in such language, and it may, in its communications to the applicant, use the forms in any other language being one of its official languages (Section 103).