All retired members and beneficiaries of the aforementioned four (4) defined benefit retirement plans administered by the Public Employees' Retirement System whose effective retirement dates are July 1, 1998, or after, and whose retirement allowances would be or have been limited by Section 415 of the Code shall be participants in the arrangements. Participation in the arrangements shall be determined each calendar year and will cease for any year in which the retirement allowance of a member or beneficiary is not limited by Section 415 of the Code.
27 Miss. Code. R. 210-55-102