REVENUE MEMORANDUM CIRCULAR NO. 48-2007 issued on July 18, 2007 circularizes the full text of the letter of Chief State Prosecutor Jovencito R. Zuño of the Department of Justice (DOJ) deputizing Bureau of Internal Revenue (BIR) Legal Officers to prosecute cases and conduct criminal proceedings involving violations of tax laws instituted by the DOJ State Prosecutors before the Court of Tax Appeals (CTA) and the regular courts.