Section 7
SEC. 7. Section twenty-one of said Act is amended to read as follows: "SEC. 21. The organization of the Regular Force shall be as follows: "(a) All other regular units shall be organized as the President may direct. "(b) The President may attach to regular units or may assign to duty with any component of the Regular Force such number of reserve officers as he may deem necessary. All periods of such duty as do not exceed twenty-one days annually shall be considered as regular annual training: all periods in excess of twenty-one days annually shall be classed as extended tours of active duty. "(c) The President may likewise attach for their prescribed period of military training such number of trainees to regular units as he deems necessary."