After nearly two years of anticipation, financial regulators unveiled a sweeping proposal Thursday to reform how they implement the Community Reinvestment Act. The plan, released at a Federal Deposit Insurance Corp. board meeting, will overhaul CRA assessment boundaries, criteria for activities earning credit in CRA exams and how banks are scored overall for their performance. If finalized, the proposal would be the first significant update to the 1977 law in over two decades. The proposal has been championed by the Office of the Comptroller of the Currency. Despite support from the FDIC, the Federal Reserve has been unwilling to sign on to the draft plan, raising concern about competing CRA regimes.