np..
Yes it's a hassle, but with all these new resitrctions on L's P1's P2's and rider, it's hard to keep track of what is the law, esp when people like you have P's prior to all these ammendements. The GD cop (assuming it was) shoulda radio'ed the radio or asked to speak to his supervisor or hwy unit on a back channel for their advice before issueing the fine. Oh well, shit happens.
Hope they compensate you for loss of work or time etc..
Heck remmeber that judge who tried to sue the dry cleaners in America? Tried to sue for them losing his pants saying it caused him emotional stress lol.. (he lost btw)
PS. You also have a 0% BAC limit on your L/P1/P2 this is not written on the back of your licence. It probably says the old 0.02 limit BAC.