Iowa Code § 92.19: Additional violations.

1. No parent, guardian, or other person, having under the parent’s, guardian’s, or other person’s control any person under eighteen years of age, shall negligently permit said person to work or be employed in violation of the provisions of this chapter.

2. No person, firm, or corporation, or any agent thereof shall negligently conceal or permit a person to be employed in violation of this chapter.

3. No person, firm, or corporation shall refuse to allow any authorized persons to inspect the place of business or provide information necessary to the enforcement of this chapter.