and
A protocol submission is not compliant if it fails to satisfy
one or more of the MUST or MUST NOT requirements for the
capabilities that it implements. A protocol submission that
satisfies all the MUST, MUST NOT, SHOULD and SHOULD NOT
requirements for its capabilities is said to be
"unconditionally compliant"; one that satisfies all the MUST
and MUST NOT requirements but not all the SHOULD or SHOULD NOT
requirements for its protocols is said to be "conditionally
compliant."
use of 2119 is abstracted an amusing level. but i don't think it
can be improved.