An applicant under an international application1 may amend the claims, description and drawings once before each elected office2 before the expiry of a specified period from the priority date3. The amendments must not go beyond the disclosure in the international application as filed unless permitted under the national law of the elected state4, and must be in accordance with the national law of the elected state in all respects not provided for in the Patent Co-operation Treaty and the Implementing Regulations
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