https://www.govinfo.gov/app/details/FR-2022-03-22/2022-06011/context
Specifically, CP and UP request relief
from 49 CFR 232.213, Extended haul
trains; 232.15, Movement of defective
equipment; and 232.103(f), General
requirements for all train brake systems,
and an exemption from the
requirements of 49 U.S.C. 20303, for a
potash unit train pair (CP train symbols
668 and 669), which are designated as
extended haul trains, that operate
between loading facilities in
Saskatchewan, Canada, and the ports of
Portland, Oregon, United States. The
requested relief would allow
technology-based advanced testing (the
Automated Brake Effectiveness (ABE)
Test Process) performed by wheel
temperature detectors as an alternative
approach to manual Class I brake tests
performed by Certified Car Inspectors
(Qualified Mechanical Inspectors).