DENR ADMINISTRATIVE ORDER NoDENR ADMINISTRATIVE ORDER No.81Subject: IMPLEMENTING RULES AND REGULATIONS FORRA 8749Pursuant to theprovisions of Section 51 of Republic Act No. 8749, otherwise known as the"Philippine Clean Air Act of 1999," and by virtue of Executive OrderNo. 192, Series of 1987, the Department of Environment and Natural Resourceshereby adopts and promulgates the following rules and regulations:PART IGENERAL PROVISIONSRULE IPRELIMINARY PROVISIONSSection 1. TitleThese Rulesshall be known and cited as the "Implementing Rules and Regulations of thePhilippine Clean Air Act of 1999."Section 2. PurposeThe purpose ofthese Rules is to provide guidelines on the operationalization of the PhilippineClean Air Act of 1999.Section 3. ScopeThese Rulesshall lay down the powers and functions of the Department of Environment andNatural Resources, the Department of Transportation and Communication, theDepartment of Trade and Industry, the Department of Energy and all ot...