32 C.F.R. § 1639.4

A registrant shall be excluded from Class 2-D when:

(a) He fails to establish that the theological or divinity school is a recognized school; or

(b) He fails to establish that the church or religious organization which is sponsoring him is so recognized; or

(c) He ceases to be a full-time student; or

(d) He fails to maintain satisfactory academic progress.