This is the ValueSet that contains all the codes in ContextControlOverridingNon-propagating (http://terminology.hl7.org/ValueSet/v3-ContextControlOverridingNon-propagating) and ContextControlOverridingNon-propagating (http://terminology.hl7.org/ValueSet/v3-ContextControlOverridingNon-propagating). E.g. what you have to deal with if you get resources containing codes in either of them