If it supports GFC, it should be visible
If an asset supports GFC, a holder should be able to understand what it is, the nature of GFC's interest in it, who independently verified the relevant information, where applicable where the asset is held, and when the information was last verified.
Gold may change category as it moves through the economic path. When gold moves from one category to another, the prior category must be adjusted so that the same economic interest is not counted twice.