2.5.3. Section 3: Capability Requirements (CR) and Gaps/Overlaps. Same as the regular ICD with the addition of the Net-Ready performance attribute table. Reference Figure B-2 and describe each attribute in terms of initial minimum values rather than threshold and objective values.

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

2.5.4.2.4. Physical Areas and Factors: The environmental and other non-threat related conditions in which the capability must operate are also identified. These conditions should be consistent with those found in the JIPOE.