(1) Any written application, written request, or other document (including goods; hereafter in this Article, the same shall apply) submitted to the Commissioner of the Korean Intellectual Property Office or the President of the Intellectual Property Trial and Appeal Board pursuant to this Act or an order issued under this Act shall take effect from the date such written application, written request or other document is served on him or her.
(2) Where a written application, written request or other document under paragraph (1) is submitted to the Commissioner of the Korean Intellectual Property Office or the President of the Intellectual Property Trial and Appeal Board by mail, such written application, written request or other document shall be deemed served on him or her on the following dates: Provided, That where a written application for registration of trademark rights or the rights relating to the trademark is submitted by mail, such written application shall take effect from the date the written application is served on him or her:
1. Where the date indicated on the correspondence date stamp under the statutes or regulations related to postal service is clear: The date indicated;
2. Where the date indicated on the correspondence date stamp under statutes or regulations related to postal service is unclear: The date a written application, written request or other document is submitted to a post office (referring to the date proved by a certificate of the receipt of mail).
(3) Except as provided in paragraphs (1) and (2), delay in the delivery of mail, loss or theft of mail, and matters necessary to submit documents due to the interruption of postal service shall be prescribed by Ordinance of the Ministry of Trade, Industry and Energy.