Md. Code, Financial Institutions § 13–1019

The bonds of any issue shall be payable solely from the property or receipts of the Authority, including, without limitation:

(1) Fees, charges, or other revenues payable to the Authority;

(2) Payments by financial institutions, insurance companies, or others pursuant to letters or lines of credit, policies of insurance, or purchase agreements;

(3) Investment earnings from funds or accounts maintained pursuant to a bond resolution or trust agreement;

(4) Proceeds of refunding bonds; and

(5) Any other source authorized by law.