Is NIST CSF mandatory for anyone?
Not by itself. But agencies / contractors using FISMA, FedRAMP, or 800-171 will reference CSF + 800-53 mappings. Many critical infrastructure sectors are now expected to implement CSF as part of CIRCIA / sector regulation.
What changed for ongoing cadence in CSF 2.0 vs 1.1?
GOVERN is the new sixth Function. Supply-chain risk (GV.SC) elevated. Outcomes apply to organisations of any size. Ongoing oversight + leadership accountability are now explicit recurring expectations.
Can we use this calendar to satisfy 800-53 / FedRAMP cadence?
Many controls map (CA-2 monthly continuous monitoring, RA-3 annual risk, AT-2 annual training, IR-3 annual tabletop, CP-4 annual contingency test). FedRAMP adds specific monthly POA&M + scan submission timelines on top — see your SSP.
How often should the target CSF Profile be reviewed?
Annually as a minimum (alongside risk assessment). After any major change in mission, environment, or threat landscape.