Paul,
Ignorance is simply the absence of knowledge and the best way to correct that is to ask a question, no pardon is necessary.
3.1.5 in the GCR says:
Restricted competitions are conducted under special Supplementary Regulations that limit participation to classes of cars not recognized in the GCR, or to invited drivers only"
In SEDIV, we "invite" other classes (ITO, ITU, SPO, SPU and GTA) that are not included in the GCR, hence the "Restricted Regional".
Hope this helps
Krys Dean