Los Angeles (CNN) -- Los Angeles Clippers owners Donald and Shelly Sterling have agreed to a voluntary sale of the NBA franchise as the league prepares a vote on a forced sale, and wife Shelly is negotiating with the NBA about voluntarily selling the team, according to a source familiar with the situation.
The couple have an agreement to allow Shelly Sterling to do the negotiations, and there have already been discussions between her and the NBA, according to the source.
The NBA wasn't immediately available for comment. Attorneys for the Sterlings declined to comment.
The NBA has banned Donald Sterling for life, and the league is advancing a vote by other team owners that would force the couple, which own the team, to sell the franchise.
The ban and pending vote -- along with a $2.5 million fine against Donald Sterling -- arise from racist remarks that the billionaire made against African-Americans.
A voluntary sale would be a new maneuver for the Sterlings. Last week, Donald Sterling hired an antitrust lawyer to fight the NBA about the proposed forced sale. And his wife has said she wanted to keep an ownership stake in the team but doesn't want to be the controlling partner.
Donald Sterling is facing a deadline Tuesday to respond to the NBA's proposal to terminate his ownership in the team, and the NBA's Board of Governors have scheduled a special meeting on that termination proposal for June 3.
The NBA contends it was damaged by the 80-year-old's racist remarks to associate V. Stiviano, 31, that were captured on an audiotape and posted online in April byTMZ and in an interview with CNN's "Anderson Cooper 360°."
"Among other things, Mr. Sterling disparaged African-Americans and 'minorities'; directed a female acquaintance not to associate publicly with African-Americans or to bring African-Americans to Clippers games; and criticized African-Americans for not supporting their communities," the NBA said in a recent statement.
In order to terminate the Sterlings' franchise rights, 75% (23) of the 30 team owners would have to vote to sustain the charge and force a sale. Because Sterling is banned from any NBA activities, he is not allowed to vote, but the Clippers will have a vote, the NBA said.