The documentation structure for VNF Guidelines has change for Beijing and there is Appendix A and Appendix B.
Appendix is now a chapter, chapter 8.
What was Appendix A is now chapter 8.1.1. "Table A1.Chef JSON File key value description" and chapter 8.1.2 "Table A2.JSON Dictionary to Post in Callback"
What was Appendix B is now chapter 8.2.1. "Table B1.Ansible JSON File key value description"

There are two possible solutions Add the letters back in the Level 2 titles in the Appendix or change the text of the effected requirements.

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Text of R-16777
“R-16777 The xNF provider MUST provide a JSON file for each supported action for the xNF. The JSON file must contain key value pairs with all relevant values populated with sample data that illustrates its usage. The fields and their description are defined in Appendix B.”

Suggested new text for R-16777
“R-16777 The xNF provider MUST provide a JSON file for each supported action for the xNF. The JSON file must contain key value pairs with all relevant values populated with sample data that illustrates its usage. The fields and their description are defined in Table B1 in the Appendix.

Text of R-18525
R-18525 The xNF provider MUST provide a JSON file for each supported action for the xNF. The JSON file must contain key value pairs with all relevant values populated with sample data that illustrates its usage. The fields and their description are defined in Appendix A.

Suggested new text for R-18525
R-18525 The xNF provider MUST provide a JSON file for each supported action for the xNF. The JSON file must contain key value pairs with all relevant values populated with sample data that illustrates its usage. The fields and their description are defined in table A1 and A2 in the Appendix.