The final outcome of Tuesday’s election on the school district’s local option budget hinges on 75 provisional ballots.

These ballots – which were called into question because voters changed their addresses or went to the wrong polling place – now are under review.

On Friday morning, the Douglas County Commission will make a final determination on whether some of those ballots will be tossed from consideration.

Because the district’s request to increase the LOB passed by such a slim margin in Tuesday’s voting, those provisional ballots could swing the election outcome.

On Tuesday, “yes” votes held a 53-vote lead, 3,783 votes to 3,730.

Douglas County Clerk Jamie Shew said, historically, about 80 percent of provisional ballots end up counting, and they tend to follow the overall election results.

But in such a close race, it can be hard to judge, he said.

“It will be interesting to see if it follows those trends because if you look at the results precinct-by-precinct, precincts were completely different whether they were for or against,” Shew said.

According to the clerk’s office, 41 provisional ballots were cast because voters had changed their address. Seventeen voters went to the wrong precinct, and 12 voters were not registered. Of the remainder, two were cast due to poll worker error, one for a voter name change, one for a first-time voter without identification and one was undetermined.

Shew’s office is investigating each ballot, and the final decision about which votes should count rests with the county commission.

School board members had asked voters to give them authority to raise an extra $679,000 – funded by local property taxes – that would be used for staff salary increases and, possibly, other programs. School officials said Tuesday night they were cautiously optimistic the results would hold up.

Opponents said the low 11.6 percent voter turnout likely meant it would pass.

The county commission will canvass the election at 9 a.m. Friday during a public meeting on the second floor of the Douglas County Courthouse, 1100 Mass.