Charge on property for common expenses.

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 and shall have priority over all other charges, except only—

1. (i) charge, if any, on the apartment for payment of taxes due to the Government or a local authority; and
2. (ii) all sums unpaid on a first mortgage of the apartment.