Iowa R. Civ. P. 1.1507
Before granting a temporary injunction, the court may require reasonable notice of the time and place of hearing therefor to be given the party to be enjoined. When the applicant is requesting that a temporary injunction be issued without notice, applicant's attorney must certify to the court in writing either the efforts which have been made to give notice to the adverse party or that party's attorney or the reason supporting the claim that notice should not be required. Such notice and hearing must be had for a temporary injunction or stay of agency action pursuant to Iowa Code section 17A.19(5), to stop the general and ordinary business of a corporation, or action of an agency of the state of Iowa, or the operations of a railway or of a municipal corporation, or the erection of a building or other work, or the board of supervisors of a county, or to restrain a nuisance.
Iowa. R. Civ. P. 1.1507