La. Public Officers and Employees § 42:1410
In the event no candidate receives a majority of the votes cast in the election, the candidates who receive the two highest number of votes cast in the election shall qualify as candidates in the runoff election. The director shall provide for the conduct of the runoff election in the same manner as provided in R.S. 42:1404, except that the ballots for the runoff election shall be distributed not less than five working days after completion of the counting of ballots in the initial election, and said ballots shall be returned by the voters to the director on or before a date fixed by the director, which date shall be not less than five nor more than ten days after the distribution of the runoff election ballots to the voters.
La. Public Officers and Employees § 42:1410