# Term:Required

## NIST SP 800-66r1

Required - As applied to an implementation specification (see implementation specification, above], indicating an implementation specification that a covered entity must implement. All implementation specifications are either required or addressable (see "addressable" above). [45 C.F.R. Sec. 164.306(d)(2]

## NIST SP 800-66

Required - As applied to an implementation specification (see implementation specification, above), indicating an implementation specification that a covered entity must implement. All implementation specifications are either required or addressable (see "addressable," above). [45 C.F.R. Sec. 164.306(d)(2]