(a) Subject to paragraphs (a-bis) and (a-ter), if the demand does not comply with the requirements specified in Rules 53.1, 53.2(a)(i) to (iii), 53.2(b), 53.3 to 53.8 and 55.1, the International Preliminary Examining Authority shall invite the applicant to correct the defects within a time limit which shall be reasonable under the circumstances. That time limit shall not be less than one month from the date of the invitation. It may be extended by the International Preliminary Examining Authority at any time before a decision is taken.
(a-bis) For the purposes of Rule 53.4, if there are two or more applicants, it shall be sufficient that the indications referred to in Rule 4.5(a)(ii) and (iii) be provided in respect of one of them who has the right according to Rule 54.2 to make a demand.
(a-ter) For the purposes of Rule 53.8, if there are two or more applicants, it shall be sufficient that the demand be signed by one of them.
(b) If the applicant complies with the invitation within the time limit under paragraph (a), the demand shall be considered as if it had been received on the actual filing date, provided that the demand as submitted permitted the international application to be identified; otherwise, the demand shall be considered as if it had been received on the date on which the International Preliminary Examining Authority receives the correction.
(c) If the applicant does not comply with the invitation within the time limit under paragraph (a), the demand shall be considered as if it had not been submitted and the International Preliminary Examining Authority shall so declare.
(e) If the defect is noticed by the International Bureau, it shall bring the defect to the attention of the International Preliminary Examining Authority, which shall then proceed as provided in paragraphs (a) to (c) .
(f) If the demand does not contain a statement concerning amendments, the International Preliminary Examining Authority shall proceed as provided for in Rules 66.1 and 69.1(a) or (b).
(g) Where the statement concerning amendments contains an indication that amendments under Article 34 are submitted with the demand (Rule 53.9(c)) but no such amendments are, in fact, submitted, the International Preliminary Examining Authority shall invite the applicant to submit the amendments within a time limit fixed in the invitation and shall proceed as provided for in Rule 69.1(e).