Pregnant Entitlement. A classified employee who is pregnant shall be entitled upon request to a maternity leave for a maximum of one year. Said employee shall notify the Superintendent in writing of her desire to take such leave and, except in case of emergency, shall give such notice at least thirty (30) days prior to the date on which her leave is to begin. She shall include with such notice either a physician’s statement certifying her pregnancy or a copy of the birth certificate of her child, whichever is applicable. An employee who is pregnant may continue in active employment throughout her pregnancy as long as she is able to properly perform her required functions.