 In Mandaluyong City, an ordinance was passed to counter the crimes committed by persons riding in tandem.For easy identification, Dagupan City, Cotabato City, Dumaguete City and Batac, Ilocos Norte have local laws prohibiting motorcycle riders from wearing helmets.In Quezon City, the local police considered a measure that would require riders of motorcycles to wear vests displaying the license plate numbers of their vehicles.