Rob Ford is accused of not declaring a conflict of interest when he gave a speech and participated in the council vote last February.
The vote was to strike down a recommendation that he repay donations he solicited using official city letterhead for his private football foundation.
Toronto resident Paul Magder took the issue to court arguing that by voting, Ford breached the Municipal Conflict of Interest Act.
If Justice Charles Hackland agrees, he could order that Ford be kicked out of the mayor's office and banned from running in the 2014 municipal election.
Hackland's decision is expected to be released by email on Monday morning.
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