The Department of Trade and Industry issued the Department Administrative Order (DAO) 21-08, series of 2021, or the “The New Technical Regulation Concerning the Mandatory Product Certification of Ceramic Plumbing Fixtures (CPFs)”. DAO 21-08 formally took effect on 22 December 2021, 15 days after its publication in The Philippine Star and Daily Tribune last 7 continue reading : DTI-BPS adds ceramic shower bases to its list of mandatory products for certification