34 Tex. Admin. Code § 304.2
A participating department may have a probationary period not to exceed six months for new personnel during which the department is not required to pay contributions for the persons on probation. When the department begins paying contributions for the persons, whether or not the probationary period has ended for other purposes, individual membership in the pension system begins.
Source Note:The provisions of this §304.2 adopted to be effective October 2, 2005, 30 TexReg 6061.