Summary

Adds a new legal definition for "yardmaster employee" in the federal rail safety code and updates related chapter headings and text about duty-hour limitations so the statute explicitly refers to yardmaster employees. The change is mostly definitional and editorial rather than creating new funding or new substantive hours-of-service rules.

• Adds a statutory definition of "yardmaster employee" to federal rail safety law.
• Updates chapter headings and text in the duty‑hour provisions to explicitly reference yardmasters.
• Change is primarily definitional and editorial, not an appropriation or a new program.
• Could clarify which employees are covered by existing duty‑hour rules and reduce ambiguity.
• Affects rail carriers and yardmaster staff most directly; may trigger internal scheduling or compliance reviews.
• Does not itself change specific hours‑of‑service limits, penalties, or funding.
• May influence enforcement or bargaining over work hours if regulators or unions rely on the new definition.