Iowa Code § 813.4 : CRIMINAL LAW AND PROCEDURE — CRIMINAL PROCEDURE — IOWA RULES OF CRIMINAL PROCEDURE — Additions to and amendment of rules TEXT PDF The rules of criminal procedure may be amended, provisions deleted, and new rules added by the supreme court, subject to section 602.4202. Iowa Code § 813.4 C79, 81, § 813.4 83 Acts, ch 186, §10134, 10201