(CNN) A federal lawsuit that will determine whether former felons in Florida who owe court fines and fees are eligible to vote is set to go to trial Monday morning.

At the heart of the case is a Florida law passed by Republican lawmakers that requires residents with felony convictions pay off all their legal financial obligations before casting a ballot.

Convicted felons in Florida had their voting rights restored with a constitutional amendment passed in November 2018. Amendment 4, which allowed convicted felons who complete "all terms of sentence" the right to vote, passed with nearly 65% of the vote, exceeding the 60% threshold required.

After Amendment 4 went into effect in January 2019, the GOP-led Florida legislature passed and Republican Gov. Ron DeSantis signed, a bill that clarified "all terms of sentence" to include legal financial obligations such as fines, fees and restitution.

A number of groups, including the Campaign Legal Center and American Civil Liberties Union, filed a flurry of legal challenges arguing the new law was unconstitutional and amounted to a "poll tax."

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