The newly elected chief of the Cherokee Nation plans to appoint the tribe’s first-ever delegate to the U.S. House of Representatives, which is outlined in a nearly 200-year-old treaty with the federal government.

In a letter Thursday to the speaker of the Cherokee Nation Tribal Council, Principal Chief Chuck Hoskin Jr. requested a special meeting of the council later this month to consider confirming Kimberly Teehee, a former adviser to President Barack Obama, to the position.

The Associated Press obtained a copy of the letter on Friday.

Hoskin, the tribe’s former secretary of state, was elected leader of the 370,000-citizen tribe, the country’s largest, in June with almost 58% of the vote.