The appointing power shall grant a military leave of absence to an employee who is a member of the National Guard for the period of active duty and travel to and from such duty as specified by the National Guard during such time as the Governor may have issued a proclamation of a state of extreme emergency or insurrection under the provisions of Sections 143 and 146 of the Military and Veterans Code or during such time as the National Guard may be on active duty for one or more situations in Section 146 of the Military and Veterans Code. Leave granted pursuant to this section shall be known as “emergency military leave.”