Welcome to the Club Alistair!
That is correct, only a written reccomendation from a Dr. is needed to be legal in the State of Cali.
The "Card", issued by P.I.D.C. (formally OCBC), is only a "faster" verification of your doctors rec that will allow you to get into clubs "faster". Does that make sense? Clubs will still allow u in, but just have to verify your Rec themselves.
Hang a COPY of your rec in your growroom. Keep the original in a safe place.
Also, keep a copy with you, or in your Vehicle. If you are pulled over by LEO and have herb on you, this will protect you.
Heres a little story. This just happened to me 2 weeks ago.
Long story short, I was pulled over for a "cali" stop at a stop sign.
When the officer walked up to my truck, he immediatly saw the 30 12" plants I had in the back seat in 4" cubes. He flipped out! Pulled his gun on me and forced me out of the truck. He cuffed me and told me I was in BIG trouble.
I laughed OUT LOAD and told him he better get his Sargent over here, or the City was going to have a big lawsuit.
I informed him I had a reccomendation from a Doctor and a reccomended Plant limit of 80 plants, and I only had 30, so piss off.
He then tells me that the County I live in only allows the State limit of 6/12.
I informed him that he was misinformed and did not understand the law. UPSET he was!
Well, Sargent dude shows up, I show him my rec with the Plant limit and infomed him that he can call the verification number to insure that it was all legit. He didn't bother.
They cut me loose with my plants and NO Cali stop ticket!
Damn right it felt good!
Know your rights, cause the cops don't.