And even the new CSX operating rules still incorporate some former NORAC rules under new rule numbers (such as the cab signal territory instructions)
In the former Conrail DCS territory, the EC-1 Form replaces the Form D. Signal aspects are still referred to by their NORAC aspects and indications.
Down on the pre-split CSX territory (Chessie, Seaboard, RF&P, etc), the EC-1 Form replaces their Form E-R and Form W, but they still use DTC forms and blocks in their dark territory.
Along my route, it is a special pain, as we not only carry the CSX rule book, but we have the NORAC book for operation on Conrail Shared Assets, and Norfolk Southern (a few of our jobs use NS (ex-Conrail) trackage. Also, portions of the Trenton Line still dispatched by SEPTA are still under full NORAC rules, despite CSX ownership.
"CSX Detector. Milepost Six Point Four. No Defects. Repeat: No Defects. Total Axles Seven Four Seven. Detector Out"