Each employing board shall keep an accurate record of the absences from duty and reasons therefor of all employees for whatsoever reason, and may require a statement from the employee when absent because of illness to the effect that the employee was unable to perform that employee’s own duties during the period of absence. The board may request a physician’s certificate if in its judgment this is necessary.

14 Del. C. 1953, § 1319; 50 Del. Laws, c. 436, § 1; 50 Del. Laws, c. 602, § 1; 70 Del. Laws, c. 186, § 1