Sec. 1. The percentage of net earnings to be declared and remitted by the following government-owned and-controlled corporations as dividends to the National Government as provided for under Sec. 3 of Republic Act No. 7656 is adjusted from at least fifty percent (50%) to the rates specified therein:
Manila International Airport Authority — ten percent
Metropolitan Waterworks and Sewerage System — twenty percent
National Development Company — zero percent
National Power Corporation — zero percent
Natural Resource and Development Corporation — forty percent
PHIVIDEC Industrial Authority — ten percent
Subic Bay Metropolitan Authority — thirty percent