babel fish,
I had a similar conversation with someone just recently re this. The same questions were asked - what is 'supervison'? and could the typical PPL SEP revalidation flight be carried out by an FI(R),whilst unsupervised? The general conclusion was that the FI(R) WOULD have to be supervised to carry out any form of 'instruction' until such time as the restriction is removed. The exact wording in Lasors etc quite clearly states that the biannual SEP Revalidation is an 'instructional' flight. The irony of course is that some who has perhaps just completed a CRI rating for SEP could of course conduct the flight 'unsupervised'.