Brazil has formally requested consultations with the World Trade Organization (WTO) in response to steep new tariffs imposed by the United States.

The 50 percent tariff, announced by President Donald Trump, targets Brazilian exports and came into effect on Wednesday. It is reportedly the highest US tariff imposed this month and follows Brazil’s legal action against former president Jair Bolsonaro, Al Jazeera reported.

Brazil’s Vice President Geraldo Alckmin said the tariffs will affect nearly 36 percent of Brazilian exports to the US—around 4 percent of the country’s total global exports.

A WTO consultation request marks the first step in resolving trade disputes, though outcomes can be slow and uncertain, according to Al Jazeera.