(a) Subject to paragraph (b) when amending the description or the drawings, the applicant shall be required to submit a replacement sheet for every sheet of the international application which, on account of an amendment, differs from the sheet previously filed. The replacement sheet or sheets shall be accompanied by a letter which shall draw attention to the differences between the replaced sheets and the replacement sheets, shall indicate the basis for the amendment in the application as filed and shall preferably also explain the reasons for the amendment.

(a) Subject to paragraph (b) when amending the description or the drawings, the applicant shall be required to submit a replacement sheet for every sheet of the international application which, on account of an amendment, differs from the sheet previously filed. The replacement sheet or sheets shall be accompanied by a letter which shall draw attention to the differences between the replaced sheets and the replacement sheets, shall indicate the basis for the amendment in the application as filed and shall preferably also explain the reasons for the amendment.

(b) Where the amendment consists in the deletion of passages or in minor alterations or additions, the replacement sheet referred to in paragraph (a) may be a copy of the relevant sheet of the international application containing the alterations or additions, provided that the clarity and direct reproducibility of that sheet are not adversely affected. To the extent that any amendment results in the cancellation of an entire sheet, that amendment shall be communicated in a letter which shall preferably also explain the reasons for the amendment.

Under PCT Article 34(2)(b), the applicant has a right to amend the claims, the description, and the drawings in the application before the International Preliminary Examining Authority (IPEA) before the international preliminary examination report is established. The amendment may be filed with the demand (PCT Article 34), within the period for reply to the written opinion of the International Searching Authority (ISA), or within the period for reply to the written opinion of the IPEA.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

(b) Where the amendment consists in the deletion of passages or in minor alterations or additions, the replacement sheet referred to in paragraph (a) may be a copy of the relevant sheet of the international application containing the alterations or additions, provided that the clarity and direct reproducibility of that sheet are not adversely affected. To the extent that any amendment results in the cancellation of an entire sheet, that amendment shall be communicated in a letter which shall preferably also explain the reasons for the amendment.

Under PCT Article 34(2)(b), the applicant has a right to amend the claims, the description, and the drawings in the application before the International Preliminary Examining Authority (IPEA) before the international preliminary examination report is established. The amendment may be filed with the demand (PCT Article 34), within the period for reply to the written opinion of the International Searching Authority (ISA), or within the period for reply to the written opinion of the IPEA.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant must submit a replacement sheet for every sheet which, on account of an amendment, differs from the sheet previously filed. The amendment must be submitted with an accompanying letter which explains the difference between the replaced sheet and the replacement sheet and which preferably explains the reasons for the amendment. In addition, the letter must indicate the basis for the amendment in the application. The basis for the amendment must always refer to the application (description, claims, drawings) as originally filed, even if multiple amendments were made during the international phase. When filing amendments to the claims, a complete set of claims in replacement of the claims as originally filed (or previously amended under Article 19) shall be submitted. For an example of how the basis for the amendment should be indicated, see MPEP § 1853. Where the amendment consists in the deletion of passages or in minor alterations or additions, the alterations or additions may be made on a copy of the relevant sheet of the international application, provided that the clarity and direct reproducibility of that sheet are not adversely affected. No replacement sheet is required where the amendment results in the cancellation of an entire sheet; such an amendment may be communicated in a letter which preferably explains the reasons for the amendment.

The applicant may make amendments at the time of filing the Demand. The applicant may also make amendments within the time limit set by the International Preliminary Examining Authority for reply to any notification under § 1.484(b) or to any written opinion. Any such amendments must be made in accordance with PCT Rule 66.8.

Where the international application was not filed in the language of publication, any amendments under Article 34 and any accompanying letter (as well as any letter accompanying Article 19 amendments) must be in the language of publication. Where the international preliminary examination is carried out on the basis of a translation of the international application, any amendments under Article 34 and any amendments under Article 19, which are to be taken into account, and any accompanying letter must be in the language of that translation. Where such amendments have been or are filed in another language, a translation of the amendments into the language in which the international preliminary examination is carried out must also be furnished. No fee is payable in respect of filing any amendments under Article 34(2)(b). If the amendments or accompanying letter are not in the required language, the International Preliminary Examining Authority will invite the applicant to furnish them within a reasonable time limit. If the applicant fails to furnish the amendments and/or the accompanying letter within the time limit set in the invitation, the International Preliminary Examining Authority shall not take such amendments into account for the purposes of the international preliminary examination.

Where the international application was not filed in the language of publication, any amendments under Article 34 and any accompanying letter (as well as any letter accompanying Article 19 amendments) must be in the language of publication. Where the international preliminary examination is carried out on the basis of a translation of the international application, any amendments under Article 34 and any amendments under Article 19, which are to be taken into account, and any accompanying letter must be in the language of that translation. Where such amendments have been or are filed in another language, a translation of the amendments into the language in which the international preliminary examination is carried out must also be furnished. No fee is payable in respect of filing any amendments under Article 34(2)(b). If the amendments or accompanying letter are not in the required language, the International Preliminary Examining Authority will invite the applicant to furnish them within a reasonable time limit. If the applicant fails to furnish the amendments and/or the accompanying letter within the time limit set in the invitation, the International Preliminary Examining Authority shall not take such amendments into account for the purposes of the international preliminary examination.

Where the international application was not filed in the language of publication, any amendments under Article 34 and any accompanying letter (as well as any letter accompanying Article 19 amendments) must be in the language of publication. Where the international preliminary examination is carried out on the basis of a translation of the international application, any amendments under Article 34 and any amendments under Article 19, which are to be taken into account, and any accompanying letter must be in the language of that translation. Where such amendments have been or are filed in another language, a translation of the amendments into the language in which the international preliminary examination is carried out must also be furnished. No fee is payable in respect of filing any amendments under Article 34(2)(b). If the amendments or accompanying letter are not in the required language, the International Preliminary Examining Authority will invite the applicant to furnish them within a reasonable time limit. If the applicant fails to furnish the amendments and/or the accompanying letter within the time limit set in the invitation, the International Preliminary Examining Authority shall not take such amendments into account for the purposes of the international preliminary examination.

Where the international application was not filed in the language of publication, any amendments under Article 34 and any accompanying letter (as well as any letter accompanying Article 19 amendments) must be in the language of publication. Where the international preliminary examination is carried out on the basis of a translation of the international application, any amendments under Article 34 and any amendments under Article 19, which are to be taken into account, and any accompanying letter must be in the language of that translation. Where such amendments have been or are filed in another language, a translation of the amendments into the language in which the international preliminary examination is carried out must also be furnished. No fee is payable in respect of filing any amendments under Article 34(2)(b). If the amendments or accompanying letter are not in the required language, the International Preliminary Examining Authority will invite the applicant to furnish them within a reasonable time limit. If the applicant fails to furnish the amendments and/or the accompanying letter within the time limit set in the invitation, the International Preliminary Examining Authority shall not take such amendments into account for the purposes of the international preliminary examination.

Where the international application was not filed in the language of publication, any amendments under Article 34 and any accompanying letter (as well as any letter accompanying Article 19 amendments) must be in the language of publication. Where the international preliminary examination is carried out on the basis of a translation of the international application, any amendments under Article 34 and any amendments under Article 19, which are to be taken into account, and any accompanying letter must be in the language of that translation. Where such amendments have been or are filed in another language, a translation of the amendments into the language in which the international preliminary examination is carried out must also be furnished. No fee is payable in respect of filing any amendments under Article 34(2)(b). If the amendments or accompanying letter are not in the required language, the International Preliminary Examining Authority will invite the applicant to furnish them within a reasonable time limit. If the applicant fails to furnish the amendments and/or the accompanying letter within the time limit set in the invitation, the International Preliminary Examining Authority shall not take such amendments into account for the purposes of the international preliminary examination.

The applicant may make amendments at the time of filing the Demand. The applicant may also make amendments within the time limit set by the International Preliminary Examining Authority for reply to any notification under § 1.484(b) or to any written opinion. Any such amendments must be made in accordance with PCT Rule 66.8.