Oval,
I've been here long enough thank you very much, maybe too long!! Last time I checked we weren't in MSS. You do know what I mean by that right?
We are in Contract Compliance period. I have not seen any directives from the HKAOA to attempt to delay departures. Even if you sign on at precisely the sign on time, you are still required to complete all your preflight duties on time. We've been signing on at STD-70 in HKG now for several years, long before CC was implemented.
As I said, let's not get carried away. I challenge anyone to give me a valid example of how signing on 10 minutes early on your published flight jeopardizes CC.