No. I live in Ca and there is no requirement to register your air gun or rifle. However if you live in San Francisco that may be a different story. They have very strict laws about any kind of gun or rifle.
Recommend you contac the CA DOJ and a lawyer for the current legal answer.
Contact the CA DOJ
No.
Yes.
You have to register for it.
Ask your local police.
One the Register CA website one can register to vote in the state of California. One must go through this process to be able to place votes in local and national elections.
Certificate Authority (CA)
yes----
If you mean ca as in Canada, please clarify, and I will be happy to explain the process.
You, as an individual, can't.