What does the discovery rule require?

Congress amended the Fair Credit Reporting Act to have a limitations period of “2 years after the date of discovery by the plaintiff of the violation that is the basis for such liability.”   The plaintiff in Mack v. Equable Ascent Financial, LLC argued that this amendment meant that “he could not have ‘discovered’ the violation until he had researched the statute.”  No. 13-40128 (April 11, 2014).  The Fifth Circuit disagreed, finding that the amendment was made to equalize the treatment of different types of claims, and that the plaintiff’s reading “would indefinitely extend the limitations period.”