The Communication Security and Surveillance Act Article 12

The communication surveillance duration of Articles 5 and Article 6 is not to exceed 30 days each time; while the communication surveillance duration of Article 7 is not to exceed one year each time. If it is necessary to continue the surveillance, specific reasons must be specified, and the last date for petition should be no later than two days before the expiration date. However, the period of continuous surveillance under Articles 5 and 6 shall not exceed one year. If the enforcement authority deems it necessary to continue surveillance, a new application shall be filed in accordance with Articles 5 and 6.Prior to the expiration of the communication surveillance described in Article 5 and Article 6, if the surveillance is deemed as unnecessary by the prosecutor or the trial judge, the surveillance activity should be halted immediately.Prior to the expiration of the communication surveillance described in Article 7, if the surveillance is deemed as unnecessary by the head of the authority overseeing national intelligence, the surveillance activity should be halted immediately.