Originally Posted by Level Attitude Your aircraft does have to be in the SEP class
...or TMG (unless I'm missing something).
OC619
I think you are:
To Renew an SEP rating 'by Experience' requires all 12 hours to have been in an SEP
unless the pilot holds
both a valid SEP and a valid TMG Rating - in which case the 12 hours could have been in either Class.
BusinessJet makes no mention of holding a TMG Rating, only referring to their SEP Rating and their C-172