This topic has already been discussed at Question: Approach for medleys. Please look at that thread for guidance. There’s currently no documentation on this point and the general idea from the thread linked is whether you need a work for a relationship and whether that work will be/has been performed multiple times.
As a sidenote, the attitudes displayed in the edit note and in this thread so far are not conducive to reaching a consensus and should be avoided. The burden of proof is on both sides, because both sides are capable of doing research and describing what they want to argue (eg. the definitions of work and recording; need vs style consistency).