(1) If the buyer signs the commercial housing sales contract before July 3, 2008, the deposit standard of the first maintenance fund is 40 yuan per square meter for the residence (including villa) and 50 yuan per square meter for the non-residential construction area.
(2) The property buyers signed the commercial housing sales contract after August 1 2008, and purchased the houses that obtained the pre-sale permit of commercial housing before February 1 2008. The deposit standard of the first maintenance fund is 40 yuan per square meter of residential (including villa) construction area and 50 yuan per square meter of non-residential construction area.
(3) If the buyer signed the commercial housing sales contract after August 1 2008, and the purchased house obtained the pre-sale permit of commercial housing after February 1 2008, or if the buyer signed the commercial housing sales contract after August 1 2008, and the initial registration of property rights has been completed, the deposit standard of the first maintenance fund is high-rise building (with elevator). Independent non-residential properties can refer to the standard of depositing maintenance funds for high-rise (elevator) houses.
How many hierarchical index funds are there currently?