TO:    
In line with the declaration of Wilderness Areas, Directive No. 4 of Letter of Instructions No. 917 is hereby amended to read as follows:

"4o  That in the interest of national security, all forest lands within a 45-kilometer radius from Palanan Point in Palanan, Isabela, and such other forest lands as may later on be identified, selected and reserved for similar purposes are declared as Wilderness Area subject to existing recognized and valid private rights.  For this purpose, natural boundaries and readily identifiable landmarks shall be used in defining the boundary of the declared Wilderness Area."

Done in the City of Manila, this 7th day of September, in the Year of Our Lord, Nineteen Hundred and Seventy-Nine.