Pursuant to DENR Administrative Order No. 2000-81, otherwise known as the Implementing Rules and Regulations of the Philippine Clean Air Act of 1999, all sources of air pollution subject to the guidelines shall have a Permit to Operate issued by the EMB Regional Director. The permits shall cover emission limitations for the regulated air pollutants.

Processing Days: 20 Days

Default Receiver: 2 days​
Case handler: 5 days​
Section chief: 4 days​
Division Chief: 4 days assessment. + 1 day payment​
Regional Director: 4 days​