AN ORDINANCE AMENDING SECTION 12 OF THE ZONING PLAN COMPRISING PORTIONS OF THE DISTRICTS OF MALATE, PACO AND STA. ANA, UNDER SECTION 2 OF ORDINANCE NO. 2830, OTHERWISE KNOWN AS THE ZONIFICATION ORDINANCE, AS AMENDED BY CONVERTING THE AREA COVERED BY ZOBEL ROXAS STREET, EASTWARD FROM THE RAILROAD TRACKS TO ALAMASTRO STREET, STA. ANA FROM RESIDENTIAL TO COMMERCIAL ZONE.