Code of Federal Regulations Title 32. National Defense § 32.1645.1 Purpose;  definitions

(i) Who has been ordained in accordance with the ceremonial ritual or discipline of a church, religious sect, or organization established on the basis of a community of faith and belief, doctrines and practices of a religious character;  and

(ii) Who preaches and teaches the doctrines of such church, sect, or organization;  and

(iii) Who administers the rites and ceremonies thereof in public worship;  and

(iv) Who, as his regular and customary vocation, preaches and teaches the principles of religion;  and

(v) Who administers the ordinances of public worship as embodied in the creed or principles of such church, sect, or organization.

(i) A person who irregularly or incidentally preaches and teaches the principles of religion of a church, religious sect, or organization;  or

(ii) Any person who has been duly ordained a minister in accordance with the ceremonial rite or discipline of a church, religious sect or organization, but who does not regularly, as a bona fide vocation, teach and preach the principles of religion and administer the ordinances of public worship, as embodied in the creed or principles of his church, sect, or organization.