Русско-англо-русский юридический словарь

Some couples who choose to live together draw up a legal agreement known as a cohabitation contract. This outlines the rights and obligations of each person towards each other. (Alternatives to marriage - Personal and family issues ... - BBC)

Novation: substitution of a party to a contract; novated person takes over all rights and obligations under the contract (Basic Contract Law for Paralegals by Jeffrey A. Helewitz)

Constitutional documents. Also known as "constituent documents", the formation documents and other internal documents of an entity that govern: the rights and obligations of the entity’s members or stakeholders; the entity’s management and operation. (Practical Law - Thomson Reuters)