Va. Const. art. IX, § 3

Before promulgating any general order, rule, or regulation, the Commission shall give reasonable notice of its contents. In all matters within the jurisdiction of the Commission, it shall have the powers of a court of record to administer oaths, to compel the attendance of witnesses and the production of documents, to punish for contempt, and to enforce compliance with its lawful orders or requirements by adjudging and enforcing by its own appropriate process such fines or other penalties as may be prescribed or authorized by law. Before the Commission shall enter any finding, order, or judgment against a party it shall afford such party reasonable notice of the time and place at which he shall be afforded an opportunity to introduce evidence and be heard. The Commission may prescribe its own rules of practice and procedure not inconsistent with those made by the General Assembly. The General Assembly shall have the power to adopt such rules, to amend, modify, or set aside the Commission's rules, or to substitute rules of its own.