40 CFR Part 201, Appendix A
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Type | Engine
General Electric Co.
| 44 ton | 8-D17000(2). |
|---|---|
| 70 ton | 6-CBFWL-6T. |
| 95 ton | 6-CBFWL-6T. |
Electromotive Division (GMC)
| SC | 8-201A. |
|---|---|
| NC | 12-201A. |
| NC1 | 12-201A. |
| NC2 | 12-201A. |
| NW | 12-201A. |
| NW1 | 12-201A. |
| NW1A | 12-201A. |
| NW2 | 12-567. |
| NW2 | 12-567A. |
| NW3 | 12-567. |
| NW4 | 12-201A. |
| NW5 | 12-567B. |
| SW | 8-201A/6-567. |
| SW1 | 6-567A/AC. |
| SW2 | 6-567. |
| SW3 | 6-567. |
| SW600 | 6-567C. |
| SW7 | 12-567A. |
| SW8 | 8-567B/BC. |
| SW900 | 8-567B. |
| SW9 | 12-567B/BC/C. |
| SW1200 | 12-567C. |
| SW1000 | 8-645E. |
| SW1001 | 8-645E. |
| SW1500 | 12-645E. |
| MP15 | 12-645E. |
| MP15AC | 12-645E. |
| GMD1 | 12-567C. |
| RS1325 | 12-567C. |
Transfer Switcher including “Cow and Calf”
| T | 12-201A(2) |
|---|---|
| TR | 12-567(2) |
| TR1 | 16-567(2) |
| TR2 | 12-567A(2) |
| TR3 | 12-567(3) |
| TR4 | 12-567A(2) |
| TR5 | 12-567B(2) |
| TR6 | 8-567B(2) |
Baldwin
| VO-660 | 6-VO. |
|---|---|
| DS-446 | 6-606NA. |
| DS4475 | 6-750. |
| S-8 | 6-606. |
| VO-1000 | 8-VO. |
| DS-4410 | 8-608NA. |
| DS-4410 | 6-606SC. |
| S-12 | 6-606A. |
| DRS-4410 1 | 6-606SC. |
| DRS-12 1 | 6-606A. |
Fairbanks Morse
| H-10-44 | 6-OP. |
|---|---|
| H-12-44 | 6-OP. |
| H-12-44TS | 6-OP. |
| H-12-46 1 | 6-OP. |
Lima
| 750 hp. | 6-Hamilton. |
|---|---|
| 800 hp. | 6-Hamilton. |
| 1000 hp. | 8-Hamilton. |
| 1200 hp. | 8-Hamilton. |
| LRS 1 | 8-Hamilton. |
| TL 1 | 8-Hamilton (2). |
ALCO and MLW
| S1 | 6-539NA. |
|---|---|
| S2 | 6-539T. |
| S3 | 6-539NA. |
| S4 | 6-539T. |
| S5 | 6-251. |
| S6 | 6-251A,B. |
| S7 | 6-539. |
| S10 | 6-539. |
| S11 | 6-539. |
| S12 | 6-539T. |
| S13 | 6-251C. |
| RSD-1 | 6-539. |
| RSC-13 | 6-539. |
| RSC-24 | 12-244 |
| RS1 | 6-539T. |
| RS2 1 | 12-244. |
| RS3 1 | 12-244. |
| RS10 1 | 12-244. |
| RSC-2 1 | 12-244. |
| RS3 1 | 12-244. |
| RSD-4 1 | 12-244. |
| RSD-5 1 | 12-244. |
| T6 | 6-251B. |
| C-415 1 | 8-251F. |
| M-420TR | 12-251. |
1 These models may be found assigned to road service as well as switcher service, but are considered switcher locomotives for the purpose of this regulation.