Sec. 27. POWER OF ATTORNEY. (a) A person eligible for payment of a pension or other benefits administered by the pension system may direct the pension system to treat as the authorized representative of the person concerning the disposition of the pension or other benefits an attorney-in-fact under a power of attorney that the pension system determines complies with Subchapters A and B, Chapter 752, Estates Code.

(b) If the power of attorney under Subsection (a) of this section is revoked, the pension system is not liable for payments made to or actions taken at the request of the attorney-in-fact before the date the pension system receives written notice that the power of attorney has been revoked.