Some authorities have very original approach to PiCUS. In the old days, to get ATPL in my country, you needed to get 250 hr PiCUS time on transport category airplane, regardless of PiC time obtained earlier and PiCUS was exactly that - F/O sitting in LH seat doing taxiing, fuel planning, writing TLB while capt. instr. in RHS would play copilot. But JAA membership is near (hopefully early next year) and some things have changed. Now you can do PiCUS time from RHS, but alas, you need to have TRI/TRE in LHS to log it.
So question for you lucky ones from the real Europe is: what do you log as PiCUS - your PF sectors or anything your capt. is happy to sign?