The Delhi Apartment Ownership Act, 1986
21. Common expenses to be a charge on the apartment –
All sums assessed by the Association of Apartment Owners, but unpaid for the share of the common expenses chargeable to any apartment, shall constitute a charge on such apartment prior to all other charges except only-
(i) The charge, if any, on the apartment for payment of Government and municipal taxes, and
(ii) All the sums unpaid on a first mortgage of the apartment.
The Delhi Apartment Ownership Act, 1986