After nearly a month of sometimes bumpy negotiations, the United States Golf Association, which will conduct the 118th United States Open next month at the Shinnecock Hills Golf Club on Long Island, is close to an agreement with the Shinnecock Indian Nation that will not only include the tribe in the event’s most public ceremonies but also afford the Shinnecock some financial gain from the tournament.

While the deal has not officially been agreed upon, both sides appear to be amenable to a variety of conditions, which will include enabling the tribe to provide parking on their territory, which is a couple of miles from Shinnecock Hills, according to people briefed on the discussions who requested anonymity because they were not authorized to speak publicly about them. A spokesman for the U.S.G.A. confirmed that progress had been made.

The relationship between the U.S.G.A. and the tribe dates to 1896, when the second U.S. Open was held at Shinnecock Hills, a course on a strip of Long Island once owned by the Shinnecock Indians and built by a Shinnecock work crew.

For generations thereafter, the Shinnecock worked at the golf club as groundskeepers and caddies. When the championship returned to Shinnecock Hills in 1986, 1995 and 2004, the tribe and the U.S.G.A. continued to partner in various ways, including arrangements that generated substantial revenue for the Shinnecock.