For NASA, almost all excepted employees are those involved in protection of life or property, as defined in this 1981 OMB memo: https://www.opm.gov/policy-data

For NASA, almost all excepted employees are those involved in protection of life or property, as defined in this 1981 OMB memo: https://www.opm.gov/policy-data-oversight/pay-leave/furlough-guidance/attachment_a-4.pdf https://www.opm.gov/policy-data-oversight/pay-leave/furlough... Sorry, I know it's not that detailed.