The most common question about National Guard deployments under EMAC are those of duty status.
In general, the three National Guard duty statuses are: State Active Duty (SAD), Title 32 (T32), and Title 10 (T10).
States deploy National Guard resources in SAD and T32 under EMAC - when they are under the control of their Governor. National Guard resources deploy under the control of the President under Title 10.
SAD and T32 are duty statues. Duty statuses are not a mechanism for a deployment outside of the home state. EMAC serves as that mechanism and provides protections (tort liability, workers compensation, etc.) for the deploying forces.
To authorize T32, the Governor of a state must request and receive approval for the use of T32 DoD funds from the Secretary of Defense. In that case, the EMAC mission is needed as the deployment mechanism and the funding for the mission is from the DoD.
A state may also use their T32 training dollars to pay missions. In some states, the EMAC REQ-A must be completed in order to get the T32 training dollars reimbursed from the DoD (if funds are available). In either case, the EMAC mission is needed as the deployment mechanism. As a note, reimbursement of the T32 training dollars is not guaranteed, it must be approved by DoD.
The deployment of resources outside of the state without EMAC may be a violation of the Anti-Deficiency Act.
The chart below should help to clarify the duty status for National Guard state domestic operations.