State governments also maintain mutual aid contracts with other states, they are called?

State governments maintain mutual aid contracts with other states through the Emergency Management Assistance Compact (EMAC).

Management Assistance Compact (EMAC) facilitates efficient resource management and integration across state lines, supporting states in enhancing their overall preparedness and response capabilities to incidents.

From the perspective of emergency management personnel, EMAC is highly valued for its role in enabling rapid, coordinated disaster response and recovery efforts, reflecting the collaborative spirit and operational efficiency that is central to NIMS and ICS principles.

EMAC’s operational framework exemplifies the principle of interoperability, which is central to the National Incident Management System (NIMS), by ensuring that resources from different states can be integrated seamlessly into local response efforts.

Source: https://training.fema.gov/emiweb/is/is700b/handouts/national_incident_management%20system_third%20edition_october_2017.pdf