Md. Code, Labor and Employment § 5–326

(a) Unless an order for a temporary variance from a regulation or part of a regulation is renewed as provided in this section, the order may not be in effect for longer than:

(1) 1 year after the order is passed; or

(2) if shorter, the period that the employer needs to achieve compliance with the regulation or part.

(b) (1) Subject to the limitations in this subsection, the Commissioner may renew an order for a temporary variance twice.

(2) The Commissioner may renew an order under this subsection only if the employer:

(i) submits an application for renewal to the Commissioner at least 90 days before the date on which the order is to expire; and

(ii) meets the requirements of this subtitle for granting a temporary variance.

(3) A renewal under this subsection may not remain in effect for more than 180 days.