Marine Corps Techniques Publication MCTP 3-30D Formerly MCWP 6-12, Religious Ministry in the United States Marine Corps , describes the Chaplain Corps’ philosophy of ministry in the context of the unique mission requirements of the United States Marine Corps. It provides the basis for how we train, plan, prepare, and provide for the free exercise of religion for Marines, Sailors, and their families. This publication defines the basic principles and outlines requirements for delivering religious ministry to the men and women of the Marine Corps. It provides guidance for commanders, chaplains, religious program specialists, lay leaders, and support personnel.