As mentioned already its PICUS when PF And P2 when PNF unless if you are captain then all PIC time, Also any time which is PICUS needs to be signed by the Captain of that flight next to the entry into the log book. These are EU/Jar reqs I guess should be same for all other authorities. I know there are some guys who have had ATPL issued without have some signatures next to PICUS time but also know other guys who have been told to get the signatures from the captains they have flown with next to each entry in their log book (long hard process to get track down guys unless your still working with them).
You can always speak to the guys at CAA gatwick very helpful lot.
Good luck