AN ACT PROVIDING FOR THE RETENTION BY THE PROTECTED AREA MANAGEMENT BOARD OF SEVENTY-FIVE PERCENT (75%) OF THE REVENUES ACCRUING TO THE INTEGRATED PROTECTED AREAS FUND (IPAF), AMENDING FOR THE PURPOSE SECTION 16 OF REPUBLIC ACT NO. 7586, OTHERWISE KNOWN AS THE “NATIONAL INTEGRATED PROTECTED AREAS SYSTEM ACT OF 1992″