Highly urbanized cities are local government units autonomous from provinces that have a minimum population of 200,000 and an annual income of at least ₱ 50 million (in 1991 constant prices).
For instance, 1st class cities have an income of ₱ 400 million or more, while 6th class cities earn less than ₱ 80 million in a four-year period.
City charter documents, if available, could be accessed by clicking on the related external link (CA indicates Commonwealth Act, RA for Republic Act).
Table notes Many pre-1987 cities had set dates of inauguration (where the president or a high-ranking government official participates in ceremonies marking the attainment of cityhood) or had set dates of organization (where the newly converted city officially starts to fully function as expected).
These dates may be set by the president, city officials or Congress.