The Secretary is authorized to conduct such investigations; hold such hearings; require such reports from any official agency, any State agency delegated authority under this chapter, licensee, or other person; and prescribe such rules, regulations, and instructions, as the Secretary deems necessary to effectuate the purposes or provisions of this chapter. Such regulations may require, as a condition for official inspection or official weighing or supervision of weighing, among other things, (1) that there be installed specified sampling, handling, weighing, and monitoring equipment in grain elevators, warehouses, and other grain storage or handling facilities, (2) that approval of the Secretary be obtained as to the condition of vessels and other carriers or receptacles for the transporting or storing of grain, and (3) that persons having a financial interest in the grain which is to be inspected (or their agents) shall be afforded an opportunity to observe the weighing, loading, and official inspection thereof, under conditions prescribed by the Secretary. Whether any certificate, other form, representation, designation, or other description is false, incorrect, or misleading within the meaning of this chapter shall be determined by tests made in accordance with such procedures as the Secretary may adopt to effectuate the objectives of this chapter, if the relevant facts are determinable by such tests. Proceedings under section 85 of this title for refusal to renew, or for suspension or revocation of, a license shall not, unless requested by the respondent, be subject to the administrative procedure provisions in sections 554, 556, and 557 of title 5.