(a) In Class 2-D shall be placed any registrant who is preparing for the ministry under the direction of a recognized church or religious organization; and

(1) Who is satisfactorily pursuing a full-time course of instruction required for entrance into a recognized theological or divinity school in which he has been pre-enrolled or accepted for admission; or

(2) Who is satisfactorily pursuing a full-time course of instruction in a recognized theological or divinity school; or

(3) Who, having completed theological or divinity school, is a student in a full-time graduate program or is a full-time intern, and whose studies are related to and lead toward entry into service as a regular or duly ordained minister of religion. Satisfactory progress in these studies as determined by the school in which the registrant is enrolled, must be maintained for qualification for the deferment.

(b) The registrant's classification shall be determined on the basis of the written information in his file folder, oral statements, if made by the registrant at his personal appearance before a board, and oral statements, if made by the registrant's witnesses at his personal appearance.