I did 12 hours 11 years ago, at the Aerobatics School of Las Vegas, in a Zlin 242L. I was intending buying a share in a Citabria, but didn't. I may have a share in an aerobatics aircraft starting in May. (Limited to basic manoeuvres.)
I'm obviously not current, and intend getting instruction if this deal comes off.
Would it be until competent?
( Likely to be 5 hours anyway.)