The polls shall open, on the day appointed, at seven o'clock A.M. and shall remain open until and not later than six o'clock P.M. No election shall be vitiated by a failure to open the polls at the time prescribed, or by closing before the time prescribed, unless, on a contest, it be established that voters were thereby deprived of votes sufficient in number and amount to have changed the result of the election.
La. R.S. § 38:1858