THE CITY OF CALOOCAN, REPRESENTED BY ITS CITY MAYOR, DALE GONZALO R. MALAPITAN, PETITIONER VS. THE CITY OF MALABON, AMADO S. VICENCIO, MARK ALLAN G. YAMBAO, DANILO V. DUMALAOG, LAURO B. BORJA, CYNTHIA A. GUTIERREZ, RICKY R. BERNARDO, EDILBERTO G. TORRES, PAYAPA V. ONA, ISAGANI P. SANTOS, BENJAMIN GALAURAN, ARNOLD D. VICENCIO, MARIA LUISA ROQUE, ALFONSO MAÑALAC, VENANCIO SEVILLA, PABLO C. CABRERA, AND ROGELIO D. YANGA, RESPONDENTS