What type of command is established by unified combatant commanders and conducts operations on continuing basis using specified criteria?

The type of command established by unified combatant commanders that conducts operations on a continuing basis using specified criteria is known as a "Joint Task Force" (JTF). JTFs are formed to address specific missions or operational requirements and can be composed of forces from multiple services and allied nations. They operate under the guidance of the unified combatant commander, ensuring coordinated and effective execution of operations within their designated area of responsibility.