conducted for the residents to ratify the city charter, most notable of which were cities that were incorporated during the early American colonial period (Manila and Baguio), and during the Commonwealth Era (1935–1946) such as Cavite City, Dansalan (now Marawi), Iloilo City, Bacolod, San Pablo and Zamboanga City. Only since 1987 has it been mandated under the Constitution that any change to the legal status of any local government unit requires the ratification by the residents that would be affected by such changes. Therefore, all cities created after 1987 – after meeting the requirements for cityhood as laid out in the Local Government Code of 1991 and Republic Act No. 9009 of 2001 – only acquired their corporate status after the majority of their voting residents approved their respective charters. Motivations for cityhood Although some early cities were given charters because of their advantageous (Baguio, Tagaytay) or strategic (Angeles City and Olongapo, Cotabato, Zamboanga) locations or in order to especially establish new government centers in otherwise sparsely populated areas (Palayan, Trece Martires, Quezon City), most Philippine cities were originally incorporated to provide a form of localized civil government to an area that is primarily urban, which, due to its compact nature and different demography and local economy, cannot be necessarily handled more efficiently by more rural-oriented provincial and municipal governments. However, not all cities are purely areas of dense urban settlement. To date there are still cities with huge expanses of rural or wilderness areas and considerable non-urban populations, such as Calbayog, Davao, Puerto Princesa and Zamboanga as they were deliberately incorporated with increased future resource needs and urban expansion, as well as strategic considerations, in mind. With the enactment of the 1991 Local Government Code, municipalities and cities have both become more empowered to deal with local issues. Regular municipalities now share many of the same powers and responsibilities as chartered cities, but its citizens and/or leaders may feel that it might be to their best interest to get a larger share of internal revenue allotment (IRA) and acquire additional powers by becoming a city, especially if the population has greatly increased and local economy has become more robust. On the other hand, due to the higher property taxes that would be imposed after cityhood, many citizens have become wary of their town's conversion into a city, even if the municipality had already achieved a high degree of urbanization