(a) (1) For each insurer, the amount of each prepayment shall be 25 percent of the amount of the annual insurance tax liability reported on the return of the insurer for the preceding calendar year.
(2) For each Medi-Cal managed care plan, the amount of each prepayment shall be 25 percent of the amount of tax the plan estimates as the amount of tax imposed by Section 12201 with respect to the plan.
(b) In establishing the prepayment amount of an insurer that has acquired the business of another insurer, the amount of tax liability of the acquiring insurer reported for the preceding calendar year shall be deemed to include the amount of tax liability of the acquired insurer reported for that year.
(c) This section shall be operative on July 1, 2012, and become inoperative on July 1, 2013. As of January 1, 2015, this section shall be repealed.