icism:disseminationControls

Authorized dissemination control portion mark abbreviation(s).
Either (a) a single abbreviation or (b) a space-delimited list
of abbreviations in the order shown in the CAPCO Register.
Exception: For the "REL" abbreviation, omit the country code
trigraph(s) and instead place the trigraph(s) in the
"releasableTo" attribute value.