Dwight Eisenhower actually said...
Any reference in any regulation or other Executive document issued or approved by the President to any provision of the Internal Revenue Code of 1939 shall, except as may be inconsistent with the Internal Revenue Code of 1954 or otherwise inappropriate, be deemed also to refer to the corresponding provision of the Internal Revenue Code of 1954.
Context
Executive Order 10574—Amendment of Executive Order No. 10480 Providing for the Administration of the Defense Mobilization...
11/04/1954