(a) A farm mutual insurance company organized between January 1, 1955, and May 21, 1973, shall maintain an unencumbered surplus of $2 for each $100 of insurance in force or an unencumbered surplus of $200,000, whichever amount is less.
(b) A farm mutual insurance company organized under this chapter on or after May 21, 1973, shall maintain an unencumbered surplus in cash of $2 for each $100 of insurance in force or an unencumbered surplus of $200,000, whichever amount is greater.

(c) A company described by Subsection (b) shall invest the minimum unencumbered surplus as provided by § 822.204. The company may invest funds in excess of the minimum unencumbered surplus as provided by the provisions of Subchapter B, Chapter 424, other than Sections 424.052, 424.072, and 424.073.
(d) A company described by Subsection (b) shall, without delay, restore the minimum unencumbered surplus if the surplus is impaired. The department shall proceed as provided by Subchapter B, Chapter 404.