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

2.3. Waivers (if applicable). In cases where the Sponsor was granted a waiver for format or content, a copy of the signed waiver or reference to the Joint Staff Gatekeeper's KM/DS approval note shall be included in the document so that all stakeholders understand the divergence of the document from the JCIDS format. For waivers to format, the Sponsor will include a "crosswalk" of the format Sections/content that stakeholders expect to see based on current JCIDS guidance, and where that content can be found in the waived document format. This additional content immediately follows the waiver and does not contribute to page count limits.