There is a lot of legal issues that the WTBTS seems to want to hide here.
First of all is overall direction to record retention, as others pointed out, is a legitimate action, presuming the WTBTS is in charge over the corporations/officers (which they claim they aren’t). This basically returns responsibility over those records back to WTBTS.
However, giving such a broad directive, especially if it points out special subjects is almost certainly legally pernicious. In many cases, ANY record of criminal behavior should be retained until the crime is reported and the conclusion of any lawsuits, whether criminal or civil, suspected criminal behavior, usually 5 years after reporting to law enforcement.
If it pertains children, then there may be a statute which says for example that such records must be retained until the person is certain age, in Connecticut, it is 30 years after reaching majority. You can’t just destroy evidence if you know or should reasonably be expected to know a crime occurred. If you have notes on a suspected crime involving children, you need to retain the records a lot longer than what people often think.