Del. Code tit. 29, § 5110

In the event any employee of this State, including any employee of the public schools, is elected to any public office provided for by the Constitution of the State or the Delaware Code, such employee shall be granted such leave of absence without pay as is reasonable and necessary to perform the duties in such office. Upon the completion of such leave, the employee shall be reinstated in the position which the employee held at the time such leave of absence was granted.