(a)

1. (1) The board may pay the cost of corrective actions and third-party compensation claims that are submitted as part of a joint claim filed on or before December 31, 2014, and that exceed the amount specified in subdivision (b), but do not exceed an amount equal to one million five hundred thousand dollars ($1,500,000) per occurrence, for which an owner or operator named in the joint claim is eligible for reimbursement under this chapter.
2. (2) If a claim from a contributing site exceeds one million dollars ($1,000,000) for an occurrence, the board may only reimburse costs submitted pursuant to Section 25299.57 for those costs in excess of one million dollars ($1,000,000).
3. (3) If a joint claim is filed on or after January 1, 2015, the board may pay the cost of corrective actions and third-party compensation claims that are submitted as part of a joint claim and that exceed the amount specified in subdivision (b), but do not exceed an amount equal to one million dollars ($1,000,000) per occurrence, for which an owner or operator named in the joint claim is eligible for reimbursement under this chapter.

(e) Both of the following costs of corrective action incurred at a contributing site may be reimbursed in accordance with subdivision (f):

1. (1) Costs incurred by an owner or operator before executing an agreement described in paragraph (7) of subdivision (a) of Section 25299.93.
2. (2) Costs relating to unauthorized releases that do not contribute to the commingled plume, but which are included in the occurrence which is the subject of the joint claim.

(f) An owner or operator may seek reimbursement of costs described in subdivision (e) by doing either of the following:

1. (1) Including a payment request for those corrective action costs with the claim filed under this article.
2. (2) Filing a claim or maintaining an existing claim under Article 6 (commencing with Section 25299.50).