The current rule is that a pilot does not actually have to complete 12 hours in 24 months-12 in last 12 months, but can be checked by an instructor with less than 12 hours. Presumably even one or two.
In this case, under EASA, The pilot would have to convince the Head of Training of an ATO or RF that he/she was fit to take a Revalidation Flight Test, with an Examiner, and then pass that Test, before his/her SEP Class Rating could be extended.
MJ
