CODIFICATION OF INTERNAL REVENUE LAWS (B) ExPIRATION or CONGRESS. -In the case of a vacancy after the expiration of a Congress which would be filled by the Com- mittee on Ways and Means, the members of such Committee who are continuing to serve as members of the Joint Committee may designate a person who, immediately prior to such expiration, was a member of such Committee and who is re-elected to the House of Representatives, to serve until his successor is chosen by such Committee. (d) ALLOWANCEs. -The members shall serve without compensation in addition to that received for their services as members of Con- gress; but they shall be reimbursed for travel, subsistence, and other necessary expenses incurred by them in the performance of the duties vested in the Joint Committee, other than expenses in connection with meetings of the Joint Committee held in the District of Columbia during such times as the Congress is in session. SEC 5002. ELECTION OF CHAIRMAN AND VICE-CHAIRMAN. The Joint Committee shall elect a chairman and vice-chairman from among its members. SEC. 5003. APPOINTMENT AND COMPENSATION OF STAFF. The Joint Committee shall have power to appoint and fix the compensation of a clerk and such experts and clerical, stenographic, and other assistants as it deems advisable. SEC. 5004. PAYMENT OF EXPENSES. The expenses of the Joint Committee shall be paid one-half from the contingent fund of the Senate and one-half from the contingent fund of the House of Representatives, upon vouchers signed by the chairman or the vice-chairman.