§ 132.02 UNAUTHORIZED ENTRY.
   No unauthorized person shall enter or remain in or upon any public building, premises or grounds in violation of any notice posted thereon or when the building, premises or grounds are closed and not open to the public. When open to the public, a failure to pay any required admission fee also constitutes an unauthorized entry.
(Iowa Code § 364.1) (1999 Code, § 42.02) Penalty, see § 10.99