For more information, see Adult Interdependent Relationships FAQs. A person who is younger than 18 years can be in an adult interdependent relationship if: they meet the requirements set out in the Adult Interdependent Relationships Act; AND they are not related to each other by blood or adoption. Generally, you do not need to make an Adult Interdependent Partner Agreement to be in an adult interdependent relationship. However, if you are a minor and want to make an Adult Interdependent Partner Agreement, you can only do so if: you are 16 or 17 years old; and your guardians sign the Agreement indicating their consent; and you are not related to your partner by blood or adoption. To figure out if you are in an Adult Interdependent Relationship, take the quiz in our booklet Living Together. Last Reviewed: November 2019