Have you read the CDC/NIH BMBL-6 yet? The ABSA International Summary of Changes and the Side-by-Side Comparison will help focus your reading.
The ABSA International Technical and Regulatory Review Committee compiled a Summary of Changes and a Side-by-Side Comparison to the 6th edition of the CDC/NIH Biosafety in Microbiological and Biomedical Laboratories (BMBL-6) released in November of 2020. The BMBL-6 continues to be, since the first edition in 1984, an advisory document. Consequently, words such as "must" and "should" have been mostly removed. In our review, we found updates to every section of the BMBL, from title changes to added references to include publications since 2009, when the 5th edition of the BMBL was published. We noticed, for example, new references to Zika and Vibrio cholera [...]