BUENOS AIRES, ARGENTINA — A major Argentinean farm group is asking a federal court to rule taxes levied on grain exports as unconstitutional, Reuters reported.

Argentine Rural Society said it filed a case alleging that grain export taxes have been illegally charged since Jan. 1 of this year. It said the deadline to regulate grain export tax rates expired on Dec. 31, 2021, and the 2022 budget bill that would have allowed an extension of the fees, was not signed in time.

Argentina charges taxes of 33% on soybean exports, 31% on soymeal and soy oil and 12% on wheat and corn.

The request still needs to go through multiple judicial steps, but Reuters said a rule in favor of the farmers would be a huge hit to the government. Agriculture exports are a key source of foreign currency for the country.