Subsets 119, 120 and 121 are NOT mandatory at the moment.
Subset 121 is NOT listed in the Annex A of the CCS TSI, nor in the informative documents of the CCS TSI Application Guide.
Subsets 119 and 120 are listed in the Annex A of the CCS TSI without version and with a note: “Reference to these specifications will be published in the Application Guide, waiting for clarifications on the rolling stock side of the interface”. The intention is to make them mandatory, once an agreement is reached on the content. Therefore, in the meantime, they have to be considered as informative documents.
Notified Bodies do not have to check compliancy against informative document, which include Subsets 119, 120 and 121.