Maryland Code, Transportation § 4-313

(a)(1) All rentals, rates, fees, tolls, and other charges and revenues derived from any transportation facilities project shall be set aside in a fund known as the “Transportation Authority Fund”, except to the extent that they are pledged under an applicable trust agreement to secure either:

(2) The Transportation Authority Fund shall be pledged to and charged with the payment of:

(b)(1) The pledge is valid and binding from the time it is made.

(2) Rentals, rates, fees, tolls, and other charges and revenues or other money so pledged and later received by the Authority immediately shall be subject to the lien of the pledge without physical delivery or any further act.

(3) The lien of the pledge is valid and binding as against all parties having any claims of any kind in tort, contract, or otherwise against the Authority, whether or not these parties have notice of the pledge.

(4) Notwithstanding any law to the contrary, neither the resolution nor any trust agreement by which a pledge is created need be filed or recorded other than in the records of the Authority.

(c)(1) Any amount set aside in the Transportation Authority Fund that is not needed to provide for the payment of the items specified in subsections (a)(2) and (b) of this section may be transferred, upon the recommendation of the Secretary and after the approval of the Board of Public Works, to the Transportation Trust Fund to be used as appropriated by the General Assembly unless prohibited by any applicable resolution or trust agreement.

(2) The use and disposition of money to the credit of the Transportation Authority Fund is subject to the provision of the applicable bond authorizing resolution or trust agreement.