No boat shall be kept at the lake except at a boathouse, the main landing at the Warden's Building, or at the fishing station upon approval of the Warden. Every boat shall be securely locked at all times when not in use, and shall have the name of its owner plainly marked thereon as conspicuously as practicable. The Warden shall impound any boat found in violation of this section.
(`90 Code, § 10-11)