It took less than a month for me to get my full Leaf California rebate. Here are the instructions I typed out for the dealership (who didn't know too much about how to do it.)
To apply for the California Rebate: Apply at the website
http://energycenter.org/index.php/incentive-programs/clean-vehicle-rebate-project" onclick="window.open(this.href);return false;
You will need:
• Proof of temporary or permanent vehicle registration. A copy of the Application for New Vehicle Registration submitted by the dealer to the California Department of Motor Vehicles (DMV) is acceptable proof of temporary vehicle registration if submitted within one year of sale.
• A copy of the sales or lease contract signed by all parties with an itemization of credits, discounts and incentives received, if applicable.
• For individuals, a copy of a utility or cable bill from within the last 3 months or other valid form of California residency. Other forms of valid proof include a signed, dated, and notarized rental agreement or a copy of current DMV registration for a different vehicle. A California driver license is not an acceptable proof of residency.
• For Businesses: For a business or nonprofit, a copy of the formation document filed with the California Secretary of State or other documentation as approved by the California Center for Sustainable Energy. Sole proprietors may submit a copy of a utility or cable bill from within the last 3 months, a current vehicle DMV registration or a notarized rental agreement.