BACOLOD CITY, NEGROS OCCIDENTAL, Philippines — The Regional Tripartite Wages and Productivity Board (RTWPB) in Western Visayas has approved P40 to P45 daily minimum wage increase for private-sector workers, which is subject to approval of the labor secretary. RTWPB-6 chair Sixto Rodriguez Jr. on Saturday said that the hike covers workers in Western Visayas, Negros.