Maryland Code, Agriculture § 5-108

(a) The Secretary may issue and enforce a written stop-sale order to the registrant, owner, custodian, or distributor of any pesticide that the Secretary finds is in violation of any provision of this subtitle or regulation under this subtitle, or has been found by federal or State authorities to cause unreasonable adverse effects to humans, animals, or the environment, or is in violation of any provision of federal pesticide laws or regulations.

(b) The order prohibits sale or distribution of the pesticide until the Secretary has evidence that the pesticide is in compliance with the law and until the Secretary provides a written release from the stop-sale order.