I think something like this to make sure they don't reject the idea:
Planning to move forward with X on $Date. Docs are here, but if you object, I totally understand and will respectfully accept your decision... though I'd hate for this to be one of those decisions that comes back to haunt you.
Planning to move forward with X on $Date. Docs are here, but if you object, I totally understand and will respectfully accept your decision... though I'd hate for this to be one of those decisions that comes back to haunt you.