Municipal obligation bond 

any security, or other instrument, including a state lease but not a lease of any other governmental entity, under which a payment obligation is created, issued by or on behalf of a governmental unit to finance a project servicing a substantial public purpose, and 1) Payable from tax revenues, but not tax allocations, within the jurisdiction of such governmental unit; 2) Payable or guaranteed by the United States of America or any agency, department or instrumentality thereof, or by a state housing agency; 3) Payable from rates or charges (but not tolls) levied or collected in respect of a non