I had a hearing for denial, revocation, or suspension of an Iowa weapons permit or application for a permit, and the administrative law judge decided against me. Can I get a rehearing?

You can apply for a rehearing within twenty days after the issuance of a final decision, stating the specific grounds for a rehearing and the relief you seek (to have you denial, suspension, or revocation rescinded).  Unless your application is granted within twenty days after you have filed it, it is deemed denied.