ATC command

I’m a lover of ATC Environnement but there is something.
Let’s say that I’m an APP/DEP Controller.
You’re asking for FL050 but another airplane is at this level.
I can’t deny it and then assign you a new altitude clearance or clear it and assign you a clearance.
There’s some communication that needs an approval or a deny.
I think we need it.

This is a little confusing, not sure really what you’re asking? Do you mean an altitude transition or a climb? I’m pretty sure ATC can deny people a flight level change.

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As a controller you would just assign them a higher Altitude no need to deny them a Altitude them give them a new one


A request to climb or descent.

But IRL they clear/deny them then assign altitude clearance, am I wrong?

No when someone contacts depature theyll say there going up to 5,000 and depature will just say climb and maintain 7,000 if they need them to be higher


Closed on request from the OP.