The way I see it is really simple. As an individual and as a company we have to explicitly follow the limits of the FOM, unless there is a current FCI that supersedes or modifies what is in the FOM.
Any FCI to do with FTL's has to be agreed with the GCAA.
Currently there is no relevant FCI of any description, therefore we follow the restrictions of the FOM, end of story.
So, no grey areas, unless of course you are unable to crew the aircraft, then things might become more blurrrred