"Polymer Waterproof Material Part 1: Sheet" National Standard Revision and Release the People's Republic of China National Standard Announcement No. 24 of 2012, the State General Administration of Quality Supervision, Inspection and Quarantine and the State Standardization Administration approved the release of the national standard "Polymer Waterproof Material Part 1: Sheet", standard No. GB 18173.1-2012, replacing GB 18173.1-2006. The new standard will be formally implemented on June 01, 2013.