Enforcement shall be appointed by the President, by and with the advice and consent of the Senate. As an exercise of the rulemaking power of the Senate, any nomination of the Deputy United States Trade Representative for Trade Enforcement submitted to the Senate for its advice and consent, and referred to a committee, shall be referred to the Committee on Finance. (3) Rank The Deputy United States Trade Representative for Trade Enforcement shall hold office at the pleasure of the President and shall have the rank of Ambassador. (c) Functions of Deputy United States Trade Representative for Trade Enforcement (1) Principal function The principal function of the Deputy United States Trade Representative for Trade Enforcement shall be to ensure that trading partners of the United States comply with trade agreements to which the United States is a party. (2) Additional functions The Deputy United States Trade Representative for Trade Enforcement shall— (A) assist the United States Trade Representative in investigating and prosecuting disputes before the World Trade Organization and pursuant to other bilateral or regional trade agreements to which the United States is a party