FAA STD-Appendix IV (Addendum to Configuration Item Specification)

40.4 Preparation instructions
The specification addendum is prepared in a manner which permits ready comparison to the exact relationship between two configuration items. This is accomplished by writing the new specification (addendum) by direct reference to the existing specification on a paragraph-by-paragraph basis, recording in the new specification specific reference to each paragraph in the existing specification and noting each addition, deletion, or change. Where no change is necessary, specify the paragraph number followed by the wording 'no change.' When no sub-paragraphs are changed, only the related major paragraphs need be listed. The paragraph numbering between the two documents shall be identical, with the exception of paragraphs added to the new document which do not have an exact counterpart in the existing specification.