(

a) Every employer in this state shall permit any employee who indicates in writing a desire in a reasonable time and can demonstrate the ability to do so, to continue the employee’s employment beyond any retirement date contained in any private pension or retirement plan. This employment shall continue so long as the employee demonstrates the ability to perform the functions of the job adequately and the employer is satisfied with the quality of the work performed. (

b) Any employee indicating this desire and continuing the employment shall give the employer written notice in reasonable time, of intent to retire or terminate when the retirement or termination occurs after the employee’s retirement date. (

c) Nothing in this

section or

Section shall be construed to prohibit any of the following:

(1) To prohibit an institution of higher education, as defined by

Section of Title of the United States Code, from imposing a retirement policy for tenured faculty members, provided that the institution has a policy permitting reemployment of these individuals on a year-to-year basis.

(2) To prohibit compulsory retirement of any employee who has attained years of age and is a physician employed by a professional medical corporation, the articles or bylaws of which provide for compulsory retirement.

(3) To prohibit compulsory retirement of any employee who has attained years of age and who for the two-year period immediately before retirement was employed in a bona fide executive or a high policymaking position, if that employee is entitled to an immediate nonforfeitable annual retirement benefit from a pension, profit-sharing, savings, or deferred compensation plan, or any combination of those plans, of the employer for the employee, which equals in the aggregate at least twenty-seven thousand dollars ($27,000).