---
kind: "unit"
title: "32"
title_heading: "National Defense"
key: "subtB/chXVI/part1630"
level: "part"
label: "Part 1630"
heading: "Classification Rules"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/32/subtB-chXVI-part1630"
sections_count: 22
---

# Part 1630 — Classification Rules

Title 32 C.F.R. — National Defense › Subtitle B — Other Regulations Relating to National Defense › Chapter XVI — Selective Service System

## Sections

- [§1630.2. Classes.](/cfr/32/1630.2.md)
- [§1630.10. Class 1-A: Available for unrestricted military service.](/cfr/32/1630.10.md)
- [§1630.11. Class 1-A-0: Conscientious objector available for noncombatant military service only.](/cfr/32/1630.11.md)
- [§1630.12. Class 1-C: Member of the Armed Forces of the United States, the National Oceanic and Atmospheric Administration or the Public Health Service.](/cfr/32/1630.12.md)
- [§1630.13. Class 1-D-D: Deferment for certain members of a reserve component or student taking military training.](/cfr/32/1630.13.md)
- [§1630.14. Class 1-D-E: Exemption of certain members of a reserve component or student taking military training.](/cfr/32/1630.14.md)
- [§1630.15. Class 1-H: Registrant not subject to processing for induction.](/cfr/32/1630.15.md)
- [§1630.16. Class 1-O: Conscientious objector to all military service.](/cfr/32/1630.16.md)
- [§1630.17. Class 1-O-S: Conscientious objector to all military service (separated).](/cfr/32/1630.17.md)
- [§1630.18. Class 1-W: Conscientious objector ordered to perform alternative service.](/cfr/32/1630.18.md)
- [§1630.26. Class 2-D: Registrant deferred because of study preparing for the ministry.](/cfr/32/1630.26.md)
- [§1630.30. Class 3-A: Registrant deferred because of hardship to dependents.](/cfr/32/1630.30.md)
- [§1630.31. Class 3-A-S: Registrant deferred because of hardship to dependents (separated).](/cfr/32/1630.31.md)
- [§1630.40. Class 4-A: Registrant who has completed military service.](/cfr/32/1630.40.md)
- [§1630.41. Class 4-B: Official deferred by law.](/cfr/32/1630.41.md)
- [§1630.42. Class 4-C: Alien or dual national.](/cfr/32/1630.42.md)
- [§1630.43. Class 4-D: Minister of religion.](/cfr/32/1630.43.md)
- [§1630.44. Class 4-F: Registrant not acceptable for military service.](/cfr/32/1630.44.md)
- [§1630.45. Class 4-G: Registrant exempted from service because of the death of his parent or sibling while serving in the Armed Forces or whose parent or sibling is in a captured or missing in action status.](/cfr/32/1630.45.md)
- [§1630.46. Class 4-T: Treaty alien.](/cfr/32/1630.46.md)
- [§1630.47. Class 4-W: Registrant who has completed alternative service in lieu of induction.](/cfr/32/1630.47.md)
- [§1630.48. Class 4-A-A: Registrant who has performed military service for a foreign nation.](/cfr/32/1630.48.md)