SECTION I. All show cases, cabinets, shelving, counters, etc., required in the installation of an exhibit, must be provided at the expense of the exhibitor, and all countershafts, steam pulleys, belting, etc., and all compressed-air connections, and all water and sewerage connections must be paid for by the person applying for the same.

SEC.  II.  All decorations and designs to be constructed in connection with the installation must conform to the rules and regulations promulgated by the director of exhibits, and receive the approval of the chief of the department interested.

    SEC.  III.  No exhibitor will be permitted to install an exhibit
    so as to obstruct the light or occasion any inconvenience to or
    disadvantageously affect the display of other exhibitors.

SEC.  IV.  The flooring of an exposition building must not be cut or removed, or its foundation disturbed, and no part of the construction of a building shall be employed for installation purposes, except upon the recommendation of the director of exhibits, approved by the director of works.

SEC.  V. Special rules regulating the height of platforms, partitions, rails, cases, cabinets, counters, and any special trophy or feature will be issued by the chiefs of the different departments, with the approval of the director of exhibits.

SEC.  VI.  All designs for the treatment of exhibition spaces must be in accordance with the foregoing limitations.  The material used for covering counters, screens, partitions, or floors will be subject to the approval of the director of exhibits, upon the recommendation of the chiefs of the department, and must be in accordance with the general color scheme of the director of works.

SEC.  VII.  Special rules and regulations in addition to and not in conflict with the general rules and regulations of the Louisiana Purchase Exposition Company may be promulgated by the different departments.

    ARTICLE XII.

SECTION I. All articles which shall be imported from foreign countries for the sole purpose of exhibition at said exposition, upon which there shall be a tariff or customs duty, will be admitted free of payment of duty, customs fees, or charges, under such regulations as the Secretary of the Treasury shall prescribe under an act of the Congress providing for the exposition.

SEC.  II.  It will be lawful at any time during the exposition to sell for delivery at the close thereof any goods or property imported for and actually on exhibition in the exposition buildings or on the grounds, subject to such regulations for the security of the revenue and for the collection of import duty as the Secretary of the Treasury shall prescribe.  Such articles when sold or withdrawn for consumption in the United States will be subject to the duty, if any, imposed