Country of origin labelling for seafood in hospitality settings: information standard and explanatory statement

I believe that some understanding and consideration is required to effectively be able to implement this requirement. There may be some challenges in the food service and events area where an event menu is sold to a client six months in advance, this menu may have the required identifying letter next to the seafood, however due to supply issues may be required to be substituted with a fish that is now potentially the same species however imported. Therefore created some challenges if the client has already sighted and selected the fish that had a letter indicating Australian fish. How will this be policed and managed effectively by regulators and would discression be applied in such circumstances.
This would also potentially have some impacts and challenges to venues with preprinted menus, where the venue may need to limit the amount of menus printed and print less more often which may cost more.
I am in support of the concept of this just wanted to raise some potential challenges that venues or event centres may have.