The Communication Security and Surveillance Act Article 18-1

Any content about any other case acquired through communications surveillance enforced in accordance with Articles 5, 6 or 7 shall not be used as evidence. However, a submission may be filed with the court within 7 days from the discovery and such evidence may be admitted if the court recognizes that said case is related to the case for which communications surveillance is enforced or if the case involves an offense listed under any Subparagraph under Article 5, Paragraph 1.Any content acquired through communications surveillance enforced in accordance with Articles 5, 6 or 7, or any evidence deriving therefrom that is not related to the purpose of the surveillance, shall not be used as evidence or for any other purpose in any judicial investigation, judgment or other proceeding and must be destroyed in accordance with Article 17, Paragraph 2.Any content acquired through interception that is in violation of Articles 5, 6 or 7 or any evidence deriving therefrom shall not be used as evidence or used for any other purpose in any judicial investigation, judgment or other proceeding and must be destroyed in accordance with Article 17, Paragraph 2.