Whenever a vacancy occurs or exists in the office of a justice of the Supreme Court while the General Assembly is in session, or whenever the term of office of a justice of the Supreme Court will expire or the office will be vacated at a date certain between the adjournment of the General Assembly and the commencement of the next session of the General Assembly, a successor may be elected at any time during a session preceding the date of such vacancy, by the vote of a majority of the members elected to each house of the General Assembly, for a full term and, upon qualification, the successor shall enter at once upon the discharge of the duties of the office; however, such successor shall not qualify prior to the predecessor leaving office. No person shall be elected or reelected to a subsequent term under this section until he has submitted to a criminal history record search and submitted to a search of the central registry maintained pursuant to § 63.2-1515 for any founded complaint of child abuse or neglect and reports of such searches have been received by the Chairmen of the House and Senate Committees for Courts of Justice. If the person has not met the requirement of filing in the preceding calendar year a disclosure form prescribed in § 2.2-3117 or 30-111, he shall also provide a written statement of economic interests on the disclosure form prescribed in § 2.2-3117 to the Chairmen of the House and Senate Committees for Courts of Justice.