Within 10 days after receiving a decision under § 12-203 of this subtitle, a grievant or a grievant's representative may appeal the decision in writing to the head of the grievant’s principal unit or designee. An appeal shall include a copy of the decision being appealed. Within 10 days after receiving an appeal, the head of the principal unit or designee shall: review the grievance record; and confer with the grievant and they shall attempt to resolve the grievance. Within 10 days after the conference, the head of the principal unit or designee shall issue a written decision to the grievant and may grant any appropriate remedy under § 12-402(a) of this title.