51 in calling for the election of the provincial governor , provincial vice-governor and members of the sangguniang panlalawigan in each province classified the chartered cities of the philippines into `` highly urbanized '' and `` component '' cities based on the annual regular income of each city , and provided that `` the registered voter of a component city may be entitled to vote in the election of the officials of the province of which that city is a component , if its charter provides '' , but that `` voters registered in a highly urbanized city , shall not participate nor vote in the election of the officials of the province in which the highly urbanized city is geographically located '' ; whereas , inasmuch as the charters of the different cities vary with respect to the right of their registered voters to vote for the provincial officials of the provinces where they are located , there is need to study the various charters of the cities and determine what cities shall and shall not vote for provincial officials pursuant to batas pambansa blg .