Desai, who was taken into custody on a complaint by election commission officials, was subsequently granted bail.
It is alleged Desai opened an office at a house on Gorat Road in Rander area without taking permission from poll authorities.
"Since the last few days, Desai has been coming to that house and presiding over election-related meetings called by his party workers. This came to the notice of election officials, who lodged a complaint against him with us today," said M M Diwan, Police Inspector of Rander.
"Desai did not take permission from authorities before converting that house into his election office," said Diwan.
Late in the evening, Desai was taken to a court, which granted him bail.