Md. Code, Environment § 9–936

(a) If an authority considers it necessary, the authority may include any limitation or restriction on the issuance of additional bonds:

(1) In the resolution that provides for the issuance of bonds of the authority; or

(2) In any trust agreement that secures the bonds.

(b) If a resolution or trust agreement places any limitation or restriction on the issuance of additional bonds, the authority shall honor the limitation or restriction when the authority issues additional bonds.