Title 30

PART 23

Part 23 - Telephones And Signaling Devices

PART 23 - TELEPHONES AND SIGNALING DEVICES Authority:30 U.S.C. 957, 961.

Sec. 23.2(f) also issued under 30 U.S.C. 811.

Source:Schedule 9B, 4 FR 1555, Apr. 11, 1939, unless otherwise noted.

30:1.0.1.2.12.0.1.1SECTION 23.1
   23.1 Purpose.
30:1.0.1.2.12.0.1.2SECTION 23.2
   23.2 Definitions.
30:1.0.1.2.12.0.1.3SECTION 23.3
   23.3 Application procedures and requirements.
30:1.0.1.2.12.0.1.4SECTION 23.4
   23.4 [Reserved]
30:1.0.1.2.12.0.1.5SECTION 23.5
   23.5 Conditions governing investigations.
30:1.0.1.2.12.0.1.6SECTION 23.6
   23.6 General requirements for approval.
30:1.0.1.2.12.0.1.7SECTION 23.7
   23.7 Specific requirements for approval.
30:1.0.1.2.12.0.1.8SECTION 23.8
   23.8 Inspection and tests.
30:1.0.1.2.12.0.1.9SECTION 23.9
   23.9 Special requirements for complete devices.
30:1.0.1.2.12.0.1.10SECTION 23.10
   23.10 Material required for MSHA records.
30:1.0.1.2.12.0.1.11SECTION 23.11
   23.11 How approvals are granted.
30:1.0.1.2.12.0.1.12SECTION 23.12
   23.12 Wording, purpose, and use of approval plate.
30:1.0.1.2.12.0.1.13SECTION 23.13
   23.13 Withdrawal of approval.
30:1.0.1.2.12.0.1.14SECTION 23.14
   23.14 Instructions for handling future changes in design.