Time for Rejection. Within 30 days after an award is mailed to a party, or, if application for modification was made, within 10 days after a determination on the application is mailed to a party, whichever period is greater, a party may reject the award or the assessment of costs under an award, or modification ruling, as provided in this regulation. Notice of Rejection. Subject to §B(2) of this regulation, a party may reject an award or the assessment of costs under an award by filing with the Director and serving on each other party a notice of rejection. A rejecting party shall also file with the court an action to nullify the award or the assessment of costs under an award. Failure to file this action, within the time period in §A of this regulation, constitutes a withdrawal of any notice of rejection. The party rejecting an award, or the assessment of costs under an award, shall notify the Director of the appellate court's case identification number as soon as it is known to the party. If an action to nullify is not timely filed, that fact shall be made known to the Director immediately by the rejecting party. Form of Action. The Maryland Rules of Procedure govern the form of all actions to nullify awards. The Director need not be named as a party to an action under this regulation.