Iowa Code § 203.2
The department may exercise general supervision over the business operations of grain dealers. The supervisory and regulatory powers authorized by this chapter shall be the responsibility of the warehouse bureau of the department. The department may inspect or cause to be inspected any grain dealer operating in this state and may require the filing of reports pertaining to the operation of the dealer's business. The department shall adopt rules to provide for the efficient administration and regulation of the provisions of this chapter, and may designate an employee of the department to act for the department in any details connected with such administration, including the issuance of licenses and approval of grain dealers' bonds in the name of the department.
Iowa Code § 203.2
89 Acts, ch 143, §101