StacksVerified U.S. regulatory reference

49 CFR §213.63

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Except as provided in paragraph (b) of this section, each track owner shall maintain the surface of its track within the limits prescribed in the following table:
  2. (b)For operations at a qualified cant deficiency, Eu, of more than 5 inches, each track owner shall maintain the surface of the curve within the limits prescribed in the following table: