This section does not apply to designated cleanout and repair tracks. To provide employees a reasonably safe place to work, each railroad company shall keep and maintain free from debris and vegetation that unreasonably affects employee safety the margins alongside yard tracks and sidetracks where employees are required to walk frequently in the course of their duties. If the Commissioner or authorized representative of the Commissioner finds any condition in or on a yard track or sidetrack or in a walkway that constitutes an immediate danger to the health or safety of the public or any railroad employee, or any condition in a sidetrack or switch that constitutes a danger to the health or safety of a railroad employee, the yard track, sidetrack, or switch may be closed immediately until the condition is corrected. This section and § 5.5-123(c) of this title shall be enforced by the Commissioner on a complaint and after a hearing. Each day of noncompliance with an order that the Commissioner issues under this section shall be regarded as a separate violation.