(1) At the general election, 1972, and every alternate year thereafter, there shall be elected in each United States congressional district a member of the United States house of representatives and any additional number of representatives to which the state may be entitled in the state at large.
(2) No person shall be elected to the house of representatives unless he has attained the age of twenty-five (25) years at the time of his election, has been a citizen of the United States at least seven (7) years and shall reside within the state at the time of his election.
(3) Each candidate shall file his declaration of candidacy with the secretary of state.
(4) Each candidate who files a declaration of candidacy shall at the same time pay a filing fee of three hundred dollars ($300) which shall be deposited in the general fund.