Md. Code Ann., Envir. § 9-1612

Any owner of bonds and the trustee, except to the extent the rights herein given may be restricted by a bond resolution, may, either at law or in equity, by suit, action, mandamus, or other proceedings, protect and enforce any and all rights under the laws of this State or granted hereunder or under the bond resolution, and may enforce and compel the performance of all duties required by this subtitle or by a bond resolution to be performed by the Administration or by any officer, employee, or agent thereof.