Each employer shall keep each record that the Commissioner requires on: wages of employees; job classifications of employees; and other conditions of employment. Each employer shall keep a record of compliance with § 3–304.2 of this subtitle for each position for at least 3 years after: the position is filled; or if the position is not filled, the position was initially posted. An employer shall keep the records required under this subsection for the period of time that the Commissioner requires. On the basis of the records required under this section, an employer shall make each report that the Commissioner requires.