The determination of the order of availability left only the process of physical examination and elimination. The War Department, through the Provost Marshal General's Office, had already determined and given notice of the number of men to be furnished by each State, and at the date of the drawing practically every State had ascertained and notified its local boards of the number required to complete their respective quotas for the first draft. The calculations of the War Department and of the States for the quotas were based upon section 2 of the act of May 18. Immediately upon the completion of the order of call lists, the local boards began to summon for physical examination, beginning with the man who was No. 1 on the list, and continuing in numerical sequence, a sufficient number of registrants to fill their quotas. The average number summoned for the first examination was about twice the number required--i. e., if a board's quota was 105, the first 210 registrants of that jurisdiction were called for physical examination. [Sidenote: Certain officials and classes exempted.] The Selective Service Law required certain persons to be exempted from military service, including Federal and State legislative, executive, and judicial officers, ministers of religion, students of divinity, persons in the military or naval service of the United States, and certain aliens. The law further authorized the discharge from draft, under such regulations as the President might prescribe, of county and municipal officers, customhouse clerks and other persons employed by the United States in certain classes of work, pilots and mariners, and, within prescribed limitations, registrants in a status with respect to persons dependent upon them for support, and persons found physically or morally unfit. Exemption from combatant service only was authorized in the case of persons found to be members of any well-recognized religious sect or organization whose existing creed or principles forbid its members to participate in war in any form, and whose religious convictions are against war or participation therein. [Sidenote: Rules governing discharges.] On June 30, 1917, the President promulgated rules and regulations as authorized by the law prescribing the reasons for and manner of granting discharges, and the procedure of local and district boards. The selective service system required the 4,557 local boards to conduct the physical examination of registrants within their jurisdictions, and to determine and dispose of claims of exemption and discharge in the first instance, excepting industrial and agricultural claims. [Sidenote: The power of the district boards.]