Maryland Code, Local Government § 21-421

(1) the cost of establishing, acquiring, designing, constructing, extending, or altering infrastructure improvements;

(2) the cost of issuing bonds;

(3) payment of the principal of and interest on loans, money advances, or indebtedness incurred by the municipality for any purpose stated in § 21-410(a) of this subtitle, including refunding of bonds previously issued; and

(4) funding of a debt service reserve fund or payment of interest before, during, or for a limited period of time after constructing the infrastructure improvements.