Professor Ronan McNulty:

It is pro ratathe whole way up. The only place that it is not pro rated is if one is a full member. Then there is no cap on what one can get. The other advantage of being full members is that one has a voice on the council.

One would be dictating the policy of CERN and have a voice in the area of physics at European and level, but there is no seat on the council unless the full membership fee is paid.