Final answer:
The complex package of treaties, protocols, and executive agreements discussing the rights of U.S. service members are part of what is known as executive agreements and security pacts, which are a form of foreign policy that doesn't require full Senate ratification, unlike treaties.
Step-by-step explanation:
A complex package of treaties, protocols, and executive agreements between the U.S. and host nations that defines the rights of the U.S. service members and their dependents is a multifaceted construct that can be broadly categorized under the terms of executive agreements and security pacts. While treaties require a two-thirds vote in the Senate for ratification, executive agreements can be enacted by the President alone or in conjunction with Congress but do not require the same level of legislative confirmation. This system allows for more agile and responsive actions in the realm of foreign policy, adapting to the complexities and rapid changes of international relations. Examples of such agreements include the North American Free Trade Agreement (NAFTA) and recent contentions such as the Iran Nuclear Deal.