Iowa Code § 138.7
When any person applying for a permit to operate a migrant labor camp is denied a permit, or when a permit is suspended or revoked, such person may appeal such denial, suspension, or revocation to the director. The director, after reasonable notice to all interested parties, shall hold a hearing upon such denial, suspension, or revocation. At the hearing all parties involved shall be entitled to be present and represented by counsel and to present such evidence as they desire as to why a permit should, or should not, be issued, suspended, or revoked. The director shall render a decision within thirty days after the termination of the hearing, and a copy of the decision shall be sent by restricted certified mail, return receipt requested, to all parties given notice of the appeal and hearing. Notice of appeal shall be sent in writing to the department by restricted certified mail, return receipt requested, by the aggrieved party. In the event such appeal is taken from a notice of suspension or revocation, such appeal shall be made prior to the date set for such suspension or revocation.
Iowa Code § 138.7