I cannot answer your question because I have not studied CA law on this. I can only comment that IRS Pub 555 is not the controlling factor because as Pub 555 states:
"Generally, the laws of the state in which you are domiciled govern whether you have community property and community income or separate property and separate income for federal tax purposes."
Whether CA allows pro-rating community property for the year of marriage or not probably can only be answered by a tax professional or tax attorney that practices in CA and deals with community property laws in CA. Each community property state has it's own laws dealing with this.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
