Can I remove registration from a meeting without changing the meeting URL?

[MichaelWS]

I want to start a meeting with registration -- and then remove registration the day before the meeting, so anyone can join at that point without registering.

Has anyone else attempted this?  

My concern is that removing registration will change the meeting URL.  Or will the same URL work for everyone, whether they registered in advance or joined after registration was no longer required?

Thanks for any guidance you can provide about this.