Utah Code Ann. § 49-22-201 – System membership -- Eligibility.

(1) Beginning July 1, 2011, a participating employer shall participate in this system.
(2)
1. (a) A person initially entering regular full-time employment with a participating employer on or after July 1, 2011, is eligible:
  1. (i) as a member for service credit and defined contributions under the Tier II hybrid retirement system established by Part 3, Tier II Hybrid Retirement System; or
  2. (ii) as a participant for defined contributions under the Tier II defined contribution plan established by Part 4, Tier II Defined Contribution Plan.
2. (b) A person initially entering regular full-time employment with a participating employer on or after July 1, 2011, shall:
  1. (i) make an election to participate in the system created under this chapter within 30 days from the date of eligibility for accrual of benefits:
    1. (A) as a member for service credit and defined contributions under the Tier II hybrid retirement system established by Part 3, Tier II Hybrid Retirement System; or
    2. (B) as a participant for defined contributions under the Tier II defined contribution plan established by Part 4, Tier II Defined Contribution Plan; and
  2. (ii) electronically submit to the office notification of the member's election under Subsection (2)(b)(i) in a manner approved by the office.
3. (c) An election made by a person initially entering regular full-time employment with a participating employer under this Subsection (2) is irrevocable beginning one year from the date of eligibility for accrual of benefits.
4. (d) If no election is made under Subsection (2)(b)(i), the person shall become a member eligible for service credit and defined contributions under the Tier II hybrid retirement system established by Part 3, Tier II Hybrid Retirement System.
(3) Notwithstanding the provisions of this section, an elected official initially entering office on or after July 1, 2011:
1. (a) is only eligible to participate in the Tier II defined contribution plan established under Chapter 22, Part 4, Tier II Defined Contribution Plan; and
2. (b) is not eligible to participate in the Tier II hybrid retirement system established under Chapter 22, Part 3, Tier II Hybrid Retirement System.