- Title R634 - Administration (§§ 634-1-1 — 634-4-8)
- Title R638 - Geological Survey (§§ 638-1-1 — 638-1-5)
- Title R641 - Oil, Gas and Mining Board (§§ 641-100-100 — 641-119-1)
- Title R642 - Oil, Gas and Mining; Administration (§§ 642-100-100 — 642-200-100)
- Title R643 - Oil, Gas and Mining; Abandoned Mine Reclamation (§§ 643-870-500 — 643-886-200)
- Title R645 - Oil, Gas and Mining; Coal (§§ 645-100-100 — 645-403-100)
- Title R647 - Oil, Gas and Mining; Non-Coal (§§ 647-1-101 — 647-8-105)
- Title R649 - Oil, Gas and Mining; Oil and Gas (§§ 649-1-1 — 649-12-6)
- Title R650 - Natural Resources, Outdoor Recreation (§§ 650-101-1 — 650-414-4)
- Title R651 - State Parks (§§ 651-101-1 — 651-802-1)
- Title R652 - Forestry, Fire and State Lands (§§ 652-1-100 — 652-160-1400)
- Title R653 - Water Resources (§§ 653-2-1 — 653-15-6)
- Title R654 - Natural Resources, Public Lands Policy Coordinating Office (§§ 654-1-1 — 654-1-14)
- Title R655 - Natural Resources, Water Rights (§§ 655-1-1 — 655-18-5)
- Title R657 - Wildlife Resources (§§ 657-2-1 — 657-71-6)