28 U.S.C. § 1713
Protection against loss by class members
The court may approve a proposed settlement under which any class member is obligated to pay sums to class counsel that would result in a net loss to the class member only if the court makes a written finding that nonmonetary benefits to the class member substantially outweigh the monetary loss.
(Added Pub. L. 109–2, § 3(a) , Feb. 18, 2005 , 119 Stat. 7 .)