http://www.estrellaproject.org/lkif-core/time-modification.owl#Efficacy_Interval
Class modification:Efficacy_Interval
Annotations
rdfs:comment
The period during which a normative fragment may be either operative or inoperative, by explicit provision of the document itself. The document is said to be in a period of operation, or enforceability or efficacy, when it may or must be applied or enforced.
