#	Regulations
1	03/14/2001 - 1926.601(b)(4)(ii) - Motor vehicles.

#	Standard Interpretations
1	09/27/2004 - 1926.601(b)(4)(ii) - Alternatives to common back-up alarms on construction motor vehicles; use of other effective technology or observers/signal persons.
2	05/27/2004 - 1926.601(b)(4)(ii) - Equipment reverse signal alarms must be audible above surrounding noise level.