A condition assessment of a retaining wall shall be conducted at periodic intervals as set forth by rule of the commissioner, but such assessment shall be conducted at least once every 5 years. The commissioner may establish staggered assessment cycles for retaining walls required to comply with this section.
The condition assessment shall be conducted on behalf of the owner by or under the direct supervision of a registered design professional with appropriate qualifications as prescribed by the department.
The condition assessment shall be conducted in accordance with rules promulgated by the commissioner.