Any appropriately cleared individual with a requirement to access an information system (IS) for performing or assisting in a lawful government purpose.
Source(s):
CNSSI 4009-2015
from
DoDD 8570.01 - Adapted
Any appropriately provisioned individual with a requirement to access an information system.
Source(s):
NIST SP 1800-27B
under Authorized User
from
CNSSI 4009-2015