2.6. Appendices. The appendices for an IS-ICD are the same as for a regular ICD.

For reference or comparison, below is what the JCIDS Manual says for the ICD 2021 itself:

2.6. Appendices. Only the following appendices are allowed in the document:

2.6.1. Since ICDs are Service, solution and cost agnostic and about MOEs, not about a materiel solution, Appendix E and Appendix F are optional, unless there is specifics relevant to the recommendation and domain in which the ICD is for.

2.6.6. Appendix E. (Optional) for ICD Cyber Survivability. If not incorporated in the main document, Sponsors will use this appendix to determine the CSRC of the CR and describe Cyber Survivability Attribute requirements IAW Annex C to Appendix G of this enclosure and the Cyber Survivability Endorsement Implementation Guide which can be found on KM/DS, Reference [4].