Section 12307 Of Article 1. Tax Returns And Initial Payments From California Revenue And Taxation Code >> Division 2. >> Part 7. >> Chapter 4. >> Article 1.

. (a) Any insurer that is granted an extension shall pay, in addition to the tax, interest at the modified adjusted rate per month, or fraction thereof, established pursuant to Section 6591.5, from April 1 until the date of payment.
  (b) This section shall become operative on July 1, 2013.