The contracting of polygamous or plural marriages is prohibited. The employment of children under the age of sixteen years in any occupation injurious to health or morals or hazardous to life or limb is prohibited. Nothing contained in this Act shall be construed to limit the power of the legislature herein provided to enact laws for the protection of life, the public health, or the public safety. * FRANCHISE 4. (Voting franchise; discrimination prohibited) The franchise shall be vested in residents of the Virgin Islands who are citizens of the United States, twenty-one years of age or over. Additional qualifications may be prescribed by the legislature: Provided, however, That no property, language, or income qualification shall ever be imposed upon or required of any voter, nor shall any discrimination in qualification be made or based upon difference in race, color, sex, or religious belief. * LEGISLATIVE BRANCH 5. {Legislature-Designation and unicameral character) (a) The legislative power and authority of the Virgin Islands shall be vested in a legislature, consisting of one house, to be designated the "Legislature of the Virgin Islands", herein referred to as the legislature. (Composition; legislative districts; method of elections) (b) The legislature shall be composed of eleven members to be known as senators. The Virgin Islands shall be divided into three legislative districts, as follows: The District of Saint Thomas, comprising Saint Thomas, Hassel, Water, Savana, Inner Brass, Outer Brass, Hans Lollik, Little Hans Lollik, Great Saint James, Little Saint James, and Capella Islands, Thatch Cay and adjacent islets and cays; the District of Saint Croix, comprising Saint Croix and Buck Islands and adjacent islets and cays; and the District of Saint John, comprising Saint John and Flanagan Islands, Grass, Mingo, Lovango, and Congo cays and adjacent islets and cays. Two senators shall be elected by the qualified electors of the District of Saint Thomas; two senators shall be elected by the qualified electors of the District of Saint Croix; and one senator shall be elected by the qualified electors of the District of Saint John. The other six senators shall be senators at large and shall be elected by the qualified electors of the Virgin Islands from the Virgin Islands as a whole: Provided, That in the election of senators at large, each elector shall be entitled to vote for two candidates, and the candidates receiving the largest number of votes shall be declared elected up to the number to be