Marine Corps Tactical Publications (MCTPs) are publications that contain focused or specific TTPs that relate to a specific function, area, or subject. Each MCTP falls under an MCWP and must follow, align, amplify, and further detail the doctrine discussed in its respective MCWP. MCTPs may or may not be partnered with another Service. DC, CD&I is the signatory authority for all MCTPs. MCTPs are to be assessed for information currency and accuracy by the respective proponent lead a minimum of every 6 years.