---
kind: "section"
citation: "30 C.F.R. § 57.19090"
title: "30"
number: "57.19090"
heading: "Dual signaling systems."
url: "https://uscodex.org/cfr/30/57.19090"
---

# §57.19090. Dual signaling systems.


There shall be at least two effective approved methods of signaling between each of the shaft stations and the hoist room, one of which shall be a telephone or speaking tube.


## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.