This property specifies a list of tags to be included in the encrypted portion of the ARQC and batch data (0xDFDF59/0xFC).
For EMV transactions, any tags not present in this list will not appear encrypted in the ARQC/batch data but will instead be included in the cleartext portion of the ARQC (0xF9/0xFA/0x70) and batch data (F9/F2).
For MSR transactions, the behavior is the same but there's an additional property that specifies which tags to include in cleartext (Property 1.1.1.1.5.3 MSR Cleartext Tag List).
For MSR transactions, only tags that are present in that list will appear in cleartext.