(a) This section applies only to a public pension fund subject to:
(1) Article 6243e.2(1), Revised Statutes;
(2) Chapter 88 (H.B. 1573), Acts of the 77th Legislature, Regular Session, 2001 (Article 6243h, Vernon's Texas Civil Statutes); and
(3) Article 6243g-4, Revised Statutes.
(b) A municipality may issue an obligation under Section 107.003 to fund all or any part of the unfunded liability of a public pension fund subject to this section only if the issuance is approved by a majority of the qualified voters of the municipality voting at an election held for that purpose.