(a) A system shall automatically provide the basic coverage to each full-time employee unless the employee has:
(1) waived participation in the basic coverage; or
(2) selected an optional coverage plan.
(b) An employee or retired employee who is automatically covered under this section may subsequently:
(1) retain the basic coverage or waive participation in the basic coverage; and
(2) apply for any other coverage provided under this chapter within applicable standards.
(c) Automatic coverage as described under this section begins on the first date of employment.