The filing of a PAR against an order, other than an order adjusting, fixing or establishing the legal regulated rent, shall stay such order until the final determination of the PAR by the commissioner. Notwithstanding the above, that portion of an order fixing a penalty pursuant to section 2526.1(a) of this Title, that portion of an order resulting in a retroactive rent abatement pursuant to section 2523.4 of this Title, that portion of an order resulting in a retroactive rent decrease pursuant to section 2522.3 of this Title, and that portion of an order resulting in a retroactive rent increase pursuant to section 2522.4(a)(2), (3), (b) and (c) of this Title, shall also be stayed by the timely filing of a PAR against such orders until the expiration of the period for seeking review pursuant to article 78 of the Civil Practice Law and Rules. However, an order granting a rent adjustment pursuant to section 2522.4(a)(2) of this Title, against which there is no PAR filed by a tenant that is pending, shall not be stayed. Nothing herein contained shall limit the commissioner from granting or vacating a stay under appropriate circumstances, on such terms and conditions as the commissioner may deem appropriate.