49 C.F.R. § 215.303 Stenciling of restricted cars.
Title 49 - Transportation
(a) Each restricted railroad freight car that is described in §215.205(a) of this part shall be stenciled, or marked— (1) In clearly legible letters; and (2) In accordance with paragraphs (b) and (c) of this section. (b) The letter “R” shall be— (1) Placed immediately below or to the right of the car number; (2) The same color as the reporting mark; and (3) The same size as the reporting mark. (c) The following terms, to the extent needed to completely indicate the basis for the restricted operation of the car, shall be placed on the car following the symbol “R” in letters not less than one inch high: (1) Age. (2) Coupler. (3) Draft. (4) Bearings. (5) Truck. (6) Underframe. (7) Wheels. (8) Yoke.
Title 49: Transportation
PART 215—RAILROAD FREIGHT CAR SAFETY STANDARDS
Subpart D—Stenciling
§ 215.303 Stenciling of restricted cars.