The Secretary shall establish and periodically review and update on a continuing basis a 5-year plan for testing motor vehicle safety standards prescribed under this chapter that the Secretary considers capable of being tested. In developing the plan and establishing testing priorities, the Secretary shall consider factors the Secretary considers appropriate, consistent with
section 30101 of this title and the Secretary’s other duties and powers under this chapter. The Secretary may change at any time those priorities to address matters the Secretary considers of greater priority. The initial plan may be the 5-year plan for compliance testing in effect on
December 18, 1991.