Md. Code, Environment § 9–957

(a) An authority is not required to pay any tax or assessment on:

(1) Any project; or

(2) The income from any project.

(b) This State, any political subdivision, and any other public agency in this State may not tax:

(1) Any bond that is issued under this subtitle;

(2) The transfer of the bond; or

(3) Any income from the bond, including any profit on the sale of the bond.