Updated from 6:21 a.m. EDTThe Securities and Exchange Commission is reviewing whether Bank of America ( BAC) broke the law by not telling shareholders about Merrill Lynch's plan to pay out $3.6 billion in bonuses before shareholders voted for a government-backed merger of the two banks, a report says. Merrill paid the bonuses in December, days before it was acquired by BofA, and a month before bonuses were normally handed out. The Charlotte, N.C.-based company said it wasn't required to tell its shareholders about the bonuses, the Financial Times reports. But Mary Schapiro, head of the SEC, wrote in a letter to a Democratic congressman that the regulator was "carefully reviewing the Bank of America disclosure" and had not yet expressed a view on whether the bonus plan should have been revealed, the newspaper reports. Last week, Rep. Dennis Kucinich (D., Ohio), chairman of an investigative House subcommittee, wrote a letter to the SEC asking whether BofA should have told its shareholders about the bonuses. He has also demanded that the Treasury and Federal Reserve reveal what they knew about the plan, given their close involvement in the merger discussions. In response to Kucinich, Schapiro wrote: "Where the SEC believes that there has been an omission of material facts necessary in order to make the statements not misleading, we will carry out our enforcement responsibilities with vigor and vigilance," the Financial Times reports. Change to Win, a federation of unions representing nearly six million workers in the U.S., wants an audit done on the financial services industry to determine whether institutions abused TARP funding to protect bonus programs from legislative reform.