An EEC may have multiple sources of a SyncE reference. It needs to decide which of these to use.
Do the standards define what the selection algorithm should be?
G.8264 Annex A describes the requirements for the selection mechanism but does not suggest an algorithm or implementation.
G.781 Annex A has a detailed description of the selection algorithm. This specifies the behaviour of the selection mechanism without suggesting an implementation.
G.781 Clause 5.12.1 describes the algorithm in general terms: