StillDark&Hungry Thank you for telling me I'm wrong then proving me right. I used that example because Flying Finn will probably know the routine. As you say if the restriction is at the behest of the receiving sector then they will ensure it happens.
In this case LACC have imposed the arrival level restriction due crossing traffic. I give an instruction to be there at the level agreed. If either a pilot or an ATCO changes that in my airspace then I need to know because quite rightly I am putting other aircraft into the same area basing separation on the instructed level and position
(plus a little bit extra for the pension) Aircraft are always handed over clean but there can be many different conditions attached to that assumption. This is one of them.
Back to common sense. If you've been given a position and level and you think something has changed then ask. That won't kill you but not asking might.
