Its quite normal for commercial pilots to fly on validations and for us to be given rights which we don't have on our home licenses. TRE rights and TRI are the usual favorites.
Ah, but you are talking about validations, do you mean validations on bits of paper where the privileges are listed? I am talking about "rendered valid", as in using the foreign licence without the need for validation.
You are required to work to the most restrictive of your licence / CofA privileges and local regulations.
That is why I believe G-reg microlight cannot be flown in the UK on a French PPL. It is all academic now anyway, because the proposed amendments to the ANO read:
50A (1) ... a person must not act as a member of a flight crew of a non-EASA aircraft registered in the United Kingdom without holding a licence granted or rendered valid under this Order.
50B An appropriate licence for the purposes of this part means a licence which entitles the holder to perform the functions being undertaken in relation to the aircraft concerned on the particular flight
http://www.caa.co.uk/docs/2131/20110...eANOLic_v2.pdf