Leonard Shapiro at The Washington Post reports that all is needed is a majority of the club's membership to approve the deal.

Aronimink Golf Club in the Philadelphia suburbs will be the temporary home for the AT&T National golf tournament in 2010 and 2011 if a majority of the club's membership approves a proposal to host Tiger Woods's signature event on the PGA Tour. The event will return to Congressional Country Club for at least three years starting in 2012.

Congressional has hosted the tournament since its inception in 2007 and will be the venue again in 2009. But the Bethesda club will be the site for the 2011 U.S. Open and the championship Blue Course will undergo a major renovation of the green complexes in the summer of 2010 that will make it unavailable for Woods's event those two years.

Aronimink, in Newtown Square, Pa., was the site for the 1962 PGA Championship won by Gary Player and the 2003 Senior PGA Championship won by John Jacobs. The course was designed by renowned architect Donald Ross and opened for play in 1928. It is annually listed among the top 100 golf courses in the United States, playing at 7,206 yards to a par of 70.

I know very little about Aroninmink other than what is stated in the last paragraph above and one other thing. Aroninmink was originally chosen by the PGA of America to host the 1993 PGA Championship. That year's PGA was instead played at Inverness outside of Toledo Ohio.

Why? Most golf fans will remember the controversy over Shoal Creek hosting the 1990 PGA because of its restrictive membership policies. What is forgotten today, is that other major championship sites had similar policies in place. Oak Tree was another, and it had the 1994 PGA taken away from it and given to Southern Hills instead. 

Aronimink GC now has minority members. As does Shoal Creek the last I heard.  Just thought I'd share some of the club's history.