This bill establishes a new section in chapter 38.08 RCW that restricts the entry of armed military forces from other states, territories, or districts into Washington without the governor's permission. The only exception to this rule is if the military force has been called into active service by the United States and is operating under the authority of the president. This measure aims to enhance the governor's authority in managing outside militia activities within the state.

Additionally, the bill declares an emergency, stating that it is necessary for the immediate preservation of public peace, health, or safety, as well as for the support of state government and its existing public institutions. As a result, the act takes effect immediately upon passage.