2016-05-27 2016-08-12 Specification Required Unassigned invalid The resulting string is not a valid label. This disposition may be assigned implicitly; see Section 7.5 of . No variant labels should be generated from a variant mapping with this type. IESG blocked The resulting string is a valid label but should be blocked from registration. This would typically apply for a derived variant that is undesirable due to having no practical use or being confusingly similar to some other label. IESG allocatable The resulting string should be reserved for use by the same operator of the origin string but not automatically allocated for use. IESG activated The resulting string should be activated for use. (This is the same as a Preferred Variant .) IESG valid The resultant string is a valid label. (This is the typical default action if no dispositions are defined.) IESG First Come First Served