The President shall receive in full for his services during the term for which he shall have been elected compensation in the aggregate amount of $400,000 a year, to be paid monthly, and in addition an expense allowance of $50,000 to assist in defraying expenses relating to or resulting from the discharge of his official duties, for which expense allowance no accounting, other than for income tax purposes, shall be made by him. He shall be entitled also to the use of the furniture and other effects belonging to the United States and kept in the Executive Residence at the White House