(a) It is lawful and permissible for any public employee who has retired under the Employees' Retirement System or the Judicial Retirement Fund to be employed with the House of Representatives, the Senate, the Department of the Examiners of Public Accounts, the Legislative Fiscal Office, or the Legislative Reference Service if the person so employed is physically and mentally capable of performing the required work in the opinion of the employing authority, is not employed in a permanent full-time capacity, does not replace a full-time employee, and does not receive compensation and expenses, other than reimbursement of normally reimbursable employee expenses, in excess of the base allowed under federal Social Security for a person age 67, as set from year to year, for any legislative session in a calendar year.

(b) A retiree employed under this section shall continue to receive all retirement benefits which the retiree would normally receive if he or she were not so employed, subject to the limitations of this section.

(c) The responsibility for compliance with this section is placed upon the employing authority and each retiree employed under this section shall certify to the employer any information required for compliance with this section.

(d) Nothing in this section or any other provision of law shall prevent a person age 65 or over who has retired under the Employees' Retirement System or the Judicial Retirement Fund from performing services for the House of Representatives, the Senate, the Department of Examiners of Public Accounts, the Legislative Fiscal Office, or the Legislative Reference Service as an independent contractor without regard to the limitations in subsection (a).