(a) The following are exempt from execution, attachment, garnishment, or any other process:
(1) benefit payments, including optional benefit payments;
(2) contributions of active employees, the state, and a participating entity, and any other contributions;
(3) any rights, benefits, or payments accruing to any person under this chapter; and
(4) any money in the Texas school employees uniform group coverage trust fund.
(b) The items listed in Subsection (a) may not be assigned except for direct payment to benefit providers as authorized by the trustee by contract, rule, or otherwise.