18 Va. Admin. Code § 35-10-150
An applicant for reexamination in Virginia shall execute and file with his other application materials, upon a form provided by the Office of the Secretary of the board, a certificate that he will have within the four months preceding the examination, studied diligently not less than 90 hours in preparation therefor.
§ 54.1-3922 of the Code of Virginia.
Derived from VR168-01-02 § 4.3, eff. October 1, 1993.