California Code, Revenue and Taxation Code - RTC § 60508

In lieu of the collection and refund of the tax on tax-paid diesel fuel exported, removed, sold, or used by a supplier in a manner that would entitle the supplier to claim a refund under this article, credit may be given the supplier upon the supplier's tax return and the determination of the amount of the supplier's tax shall be in accordance with any rules and regulations the board may prescribe.