The process of negotiating pacts often involves the creation of joint committees, including members appointed by the governors of the countries under negotiation.  Other methods include direct negotiations by the governors themselves, the promotion of pacts by the National Conference of State Legislators and the adoption of a pact proposed by a state legislator and the invitation of that state to adopt other identical statutes.  States that negotiate notes themselves may invite representatives of the federal authorities to participate; When Congress invited negotiations on a water allocation pact that would involve the District of Columbia, a non-governmental jurisdiction whose legislative decree is subject to congressional review, Congress said that federal officials would be needed in negotiations.  In the knowledge that their states have an integrated regional economy, New York Governor Andrew M. Cuomo, New Jersey Governor Phil Murphy, Connecticut Governor Ned Lamont, Pennsylvania Governor Tom Wolf, Delaware Governor John Carney and Rhode Island Governor Gina Raimondo today announced the creation of a multi-state council to restore the economy and get people back on the job. This announcement builds on the regional approach taken by states to combat the COVID 19 pandemic.  Michael L. Buenger et al., The Evolving Law and Use of Interstate Compacts 3 (2d ed. 2016).
Agreements between states must be approved by the U.S. Congress. There are three main options for a compact to get approval: Many offers for compacts in the National Center for Interstate Compacts database contain links to the websites of intergovernmental agencies that are made by these compacts. These intergovernmental agency websites, such as the Multistate Tax Commission described above, may contain an agency`s pact, statutes, other internal administrative documents, guidelines for Member States, annual reports and other documents. Here are some examples of this: While the Associated Press (and other comments) calls them the Interstate Compacts, it is not clear that they meet this standard, at least as is understood in a legal use of the term Interstate Compacts. The Supreme Court has recognized (rightly, I think) that a “compact” calls, for example, for some kind of reflection, including “mutual statements that can reasonably be treated as they can be made for reciprocal reasons,” or a kind of “recisiveness.” In other words, coordinated behaviour or activity is not “compact” if there is no link to the states that are part of it. If it is only a gesture of goodwill, unilateral actions from which States can withdraw at any time, it is not a “compact”. And that means the compact clause is not involved.  Multistate Tax Compact, Council of State Governments, apps.csg.org/ncic/Compact.aspx?id=122 (the last visit was on June 19, 2018).
Again, the emphasis is on joint consultation and the working agreement within a common framework.  Buenger et al., supra note 2, at 106. The Interstate Agreement on Detainers was codified in the U.S. Code at 18 U.S.C.app., uscode.house.gov/view.xhtml?path=/[email protected]/title18a/node5 prelim edition.