California Revenue And Taxation Code Section 8352.4
Subject to Sections 8352 and 8352.1, there shall be transferred from the money deposited to the credit of the Motor Vehicle Fuel Account to the Harbors and Watercraft Revolving Fund, for expenditure in accordance with Division 1 (commencing with Section 30) of the Harbors and Navigation Code, the sum of six million six hundred thousand dollars ($6,600,000) per annum, representing the amount of money in the Motor Vehicle Fuel Account attributable to taxes imposed on distributions of motor vehicle fuel used or usable in propelling vessels. The actual amount shall be calculated using the annual reports of registered boats prepared by the Department of Motor Vehicles for the United States Coast Guard and the formula and method of the December 1972 report prepared for this purpose and submitted to the Legislature on December 26, 1972, by the Director of Transportation. If the amount transferred during each fiscal year is in excess of the calculated amount, the excess shall be retransferred from the Harbors and Watercraft Revolving Fund to the Motor Vehicle Fuel Account. If the amount transferred is less than the amount calculated, the difference shall be transferred from the Motor Vehicle Fuel Account to the Harbors and Watercraft Revolving Fund. No adjustment shall be made if the computed difference is less than fifty thousand dollars ($50,000), and the amount shall be adjusted to reflect any temporary or permanent increase or decrease that may be made in the rate under the Motor Vehicle Fuel Tax Law. Payments pursuant to this section shall be made prior to payments pursuant to Section 8352.2. When deemed necessary by the Department of Transportation and the Department of Boating and Waterways, the Department of Transportation, after consultation with the Department of Boating and Waterways, shall prepare, or cause to be prepared, an updated report setting forth the current estimate of the amount of money credited to the Motor Vehicle Fuel Account attributable to taxes imposed on distributions of motor vehicle fuel used or usable in propelling vessels. The Department of Transportation shall submit the report to the Legislature upon its completion.