There is no doubt that parking restrictions at Cork have greatly increased in recent years. For example in the 1990's wide bodied aircraft could frequently park near the old terminal. Further more the South Ramp which was for many years the Airports unofficial General Aviation Park is now only allowed to cater for one small size business jet.
There is also restrictions on General Aviation flights parking in the vicinity of Commercial traffic and I'm told that this policy is also problematic as some of the larger executive types such as the BBJ and A319 are not allowed park in the stands South of Stand 5.
The problem at Cork is that the airport authority has marked all of the apron stands with Commercial airliners in mind. The IAA/DAA are said to have a one stand one aircraft rule which in effect means that if two Be200's arrive they must each occupy stands more suitable for commercial airliners. Added to this aircraft are charged premium parking rates as after 50 years, Cork still doesn't have any remote parking areas or General Aviation Ramp.
Whether these restrictions are as a result of IAA guidelines, directives or formal notams is a mute point. The fact is that red tape often wins out over common sense in the Cork Airport of 2012. Ultimately it is the airport authority's responsibility to make what ever changes in infrastructure that are needed to cater for its customers. However this doesn't appear to be happening when it comes to parking provision.