According to the Department of Transportation (DOT), the Pipeline and Hazardous Materials Safety Administration (PHMSA) 49 CFR Part 199 defines a covered employee as the following:
“Covered employee: A person who performs work on a pipeline or liquefied natural gas (LNG) facility an operation, maintenance, or emergency-response function.”
The official DOT document has been attached below for further review. Anything specific or additional requirements beyond this would need to be confirmed by the company operating the pipeline you’re performing work on.
ODAPC Employees Covered Under Dot Testing Regulation 49 CFR Part 40