This only applies to your ERS retirement account.
If you were hired before 09/01/2009 and leave state employment and don't withdraw your retirement contributions, you may still qualify for retirement at age 60, but only if you have enough service credit or qualify under the Rule of 80. This applies even if your age and service credit will not total 80 until after you leave state employment. You must retire directly from state employment to use your annual and sick leave.
If you do not retire directly from state employment, you must wait 90 days before your health insurance begins as a retiree if you are eligible for insurance.