DISA has released the Apple iOS/iPad OS 15 Security Technical Implementation Guide (STIG). The requirements of the STIG become effective immediately.
Customers with a CAC that has DOD certificates can obtain the STIG at https://cyber.mil/stigs/downloads/.
For those without a CAC that has DOD certificates, the STIG is available from https://public.cyber.mil/stigs/downloads/.
If you are unable to find and download the content, please report issues to the DoD Cyber Exchange Web team at firstname.lastname@example.org. For all questions related to the STIG content, please contact the DISA STIG Customer Support Desk at email@example.com.