No requirement to modify the normal course of the flight if the weather degrades?

[ScepticalOptomist]

Originally Posted by A323480er

I'd like to think of it as a worst case what if we have passed the EEP and something worst happened like ERA weather went below minima + OEI/Decom + no possible re-route at the point. What should we do then?

If your only available airport was below minima you would declare an emergency and do whatever was required to achieve a safe landing.