Secures all kinds of programmable logic controllers regardless of manufacturer, type, purpose and location; IND.2.1 General ICS Components applies alongside it, and this Baustein adds the PLC-specific requirements on extended system documentation and time synchronisation. In Edition 2023 the Baustein carries 3 requirement numbers, 2 of them live: 0 Basis requirements (B, MUSS, to be fulfilled first and without exception), 2 Standard requirements (S, SOLLTE) and 0 requirements for elevated protection needs (H), with 1 number withdrawn (ENTFALLEN) and kept for stable numbering. It is applied to an IT system in modelling order R2. The requirements property on this node lists every requirement by number, title, level and responsible role, so a requirement is cited as IND.2.2.A<n>.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.