How many calculation models are there for Singapore's property tax collection?

At present, there are two calculation models of Singapore property tax collection, which are distinguished by housing use. If the house is occupied by oneself and enjoys preferential treatment, 4% property tax will be levied; If the leased property is used for investment or other purposes, the property tax of 10% shall be levied. Among them, self-occupied residents and residents of government housing units can enjoy self-occupied concessions, and self-occupied residents need to apply for self-occupied concessions, while residents of government housing units can enjoy this concession without applying.