Md. Code, Transportation § 7–306

(a) Subject to constitutional limitations, this State and its political subdivisions may:

(1) Make grants to the Administration;

(2) Guarantee any obligations of the Administration;

(3) Make contributions to meet any operating expenses of the Administration; and

(4) Contract with the Administration, any lender, or any trustee under an indenture or loan agreement made by the Administration.

(b) Unless otherwise authorized by law, the Administration:

(1) Does not have any power to impose any commitment or obligation on this State or any of its political subdivisions; and

(2) May not levy any tax.