EP4600 - Legal at Regionals?

[GPS1]

Can anyone help me out with this!!
I just purchased 6 packs of EP Enrichpower matched 4600mah batteries ( NOT Cheap when you aint sponsered!! ) which I understood to be race legal to IFMAR/ROAR/EFRA/BRCA rules.
I now find out that they don't have some "08" sticker on them and are therefore NOT race legal at BRCA National events, as per the Electric Board rules. This in its self aint a problem as I'm not doing any National events this year! However, I am doing the Regionals!!
Now I'v looked, but I cannot find anything saying these cells are Illegal at Regional level. The approved battery list on the BRCA website even say's:
'Only cells detailed below are approved for BRCA NATIONAL events in 2008'
Is this a loophole in the BRCA rules? Or has my first season back just gone out the window before it's even started?
I can not afford to see £250+ go down the drain!! And it's the first Regional this Sunday!!!!
Help and advise is needed please!!!!!