Rule 577.1 — (Optional to 566.1 with System) Signal Indication Suspended While Switching

1. (a)A train or transfer may be authorized to manually operate specific dual control switches at a controlled location as prescribed by Rule 104.2, paragraph (d). Such authority must be included with work authority, as prescribed by Rule 577. The indications of signals governing operation over such switches may be considered suspended while switches are in the “hand” position, but only while switching is being performed at the designated controlled locations. Note: Verbal permission may be given to manually operate specific dual control switches within the limits of Rule 577 authority that did not include Rule 577.1 authority for those switches.
2. (b)When switching is to be performed over a spring switch, which is included in the limits of a work authority prescribed by Rule 577, the indication of the signal governing operation over such switch may be considered suspended if the switch is properly lined.

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