ToA or ACT

Treaties of Amity (often referred to as ToA's) are a type of interalliance treaty wherein the signatory alliances agree to close bonds of friendship and to provide economic aid or military defense in certain circumstances. ToA's differ from MDP's in that aid and war remain optional, rather than mandatory.
The Amity and Cooperation Treaty (ACT) is a specialized treaty originally created by the NADC after their original creation, the ToA had become the equivalent of a NAP.