Enforcement— In addition to other amounts, there is appropriated the following amounts for necessary expenses for tax enforcement activities of the Internal Revenue Service to pursue the objectives described in section 3(a)(1), including to determine and collect owed taxes, to provide legal and litigation support, to conduct criminal investigations, to enforce criminal statutes related to violations of internal revenue laws and other financial crimes, to purchase and hire passenger motor vehicles (
31 U.S.C. 1343(b)), and to provide other services as authorized by
5 U.S.C. 3109, at such rates as may be determined by the Commissioner: