(a) Each receiving Office shall notify the International Bureau of the language or languages which, having regard to Rule 12.1(b), it is prepared to accept under Rule 12.1(a) for the filing of international applications.
(a-bis) Each receiving Office shall notify the International Bureau of the language or languages of any language-dependent free text which, having regard to Rules 12.1(a) and (b), it is prepared to accept under Rule 12.1(d) for the filing of the sequence listing part of the description.
(b) Each receiving Office shall notify the International Bureau of any change to the information notified under paragraphs (a), (a-bis), (d) and (e). If the change means that
(i) the receiving Office is no longer prepared to accept the filing of international applications in a language that it had previously notified the International Bureau that it was prepared to accept; or
(ii) the receiving Office is no longer prepared to accept the translation of international applications into a language of publication that it had previously notified the International Bureau that it was prepared to accept; or
(iii) the receiving Office is no longer prepared to accept the filing of requests in a language that it had previously notified the International Bureau that it was prepared to accept; or
(iv) the receiving Office is no longer prepared to accept the filing of the sequence listing part of the description containing language-dependent free text in a language that it had previously notified the International Bureau that it was prepared to accept,
the effective date of such change shall be two months after the date of publication of the notification of the change in the Gazette pursuant to Section 405 or such later date as may be determined by the receiving Office.
(c) Nothing in paragraph (a), (a-bis), (b), (d) or (e) prevents any receiving Office from accepting, in a particular case,
(i) the filing of an international application in a language that it has not notified the International Bureau that it is prepared to accept; or
(ii) the translation of an international application into a language of publication that it has not notified the International Bureau that it is prepared to accept; or
(iii) the filing of a request in a language that it has not notified the International Bureau that it is prepared to accept; or
(iv) the filing of the sequence listing part of the description containing language-dependent free text in a language that it has not notified the International Bureau that it is prepared to accept.
(d) Each receiving Office concerned shall notify the International Bureau of the language or languages which it is prepared to accept under Rule 12.4(a) for the translation of international applications into a language of publication.
(e) Each receiving Office shall notify the International Bureau of the language or languages which it is prepared to accept under Rule 12.1(c) for the filing of requests.