With just the CLB score, the application will be returned. It takes may be 2-3 weeks or sometimes more for you to receive it by snail mail.
If the new rules kick in by then (nobody know when for sure so u never know), then you will not be able to apply if you don't have the 4/6 yrs
residency. However if by any chance you have the CELPIP scores before the new 4/6 rule comes int to effect, you should be able to apply right away...
Your call.