(a) Member contributions, including contributions picked-up by the employer pursuant to Government Code §825.409 and contributions for the purchase or re-instatement of service credit, may not be withdrawn prior to the time the member terminates employment in all positions with a TRS-covered employer, except as otherwise provided by this section.     
      (b) A member who is serving as a substitute as described under §25.4 of this title (relating to Substitutes) and who is not employed in any other capacity with the same or another TRS-covered employer may withdraw member contributions.     
      (c) Except as provided in subsection (b) of this section, a member employed by a TRS-covered employer may not terminate TRS membership and may not withdraw member contributions, including when the employment is ineligible for TRS membership.     
      (d) Any withdrawal must be a complete withdrawal. No partial withdrawals are allowed.     
     Source Note:        The provisions of this §27.2 adopted to be effective January 1, 1976; amended to be effective June 1, 1995, 20 TexReg 3734; amended to be effective March 12, 2003, 28 TexReg 2102; amended to be effective March 8, 2007, 32 TexReg 1086