and just to get things spot on the term is biennial.
The term is neither 'biennial' or bi-annual, but:
'A training flight of at least one hour with a Flight Instructor.'
This must be completed, as LA says, in the second of the 2 year validity of the SEP Class Rating, and may be divided into no more than 3 separate flights, so long as they are with the same Instructor.
MJ
