Ensuring the task force faithfully pursues the purpose set forth in subparagraph (A) of paragraph (1) and carries out its duties as set forth in subparagraph (B) of such paragraph. (iv) Carrying out such activities as are required of the head of the task force under subsections (b) and (c). (b) Requirements and plans for information operations (1) Combatant command planning The Secretary shall require each commander of a combatant command to develop such requirements and specific plans as may be necessary for the conduct of information operations, including plans for deterring information operations, particularly in the cyber domain, by malign actors against the United States, allies of the United States, and interests of the United States. (2) Implementation plan for Department of Defense strategy for operations in the information environment (A) In general Not later than 90 days after the date of the enactment of this Act, the head of the task force shall— (i) review the Department of Defense Strategy for Operations in the Information Environment, dated June 2016