consent capacity
The legal ability to give valid consent to sexual acts, assessed case by case
Consent capacity is a recognised doctrine in international criminal law denoting a person's legal ability to give valid and binding consent to sexual acts. The doctrine is not anchored in one particular national legal system, but appears as a load-bearing principle in case law and legislation in a number of countries, including the United States, the United Kingdom and other Western jurisdictions.
To possess consent capacity, a person must be able to understand what the sexual act in question involves, be able to assess its significance and possible consequences, and voluntarily and without pressure express a yes or a no. It is not sufficient that a person passively fails to resist — the consent must be informed and expressed by someone with genuine decision-making ability.
In cases involving people with cognitive disabilities, intellectual impairments or severe communicative limitations, the question arises whether the person in fact possessed this ability at the time of the act. A disability does not in itself automatically mean that consent capacity is absent. The assessment is concrete and individual: it attaches to the person's actual understanding and decision-making ability, not to a diagnosis alone.
If a court finds that a person lacked consent capacity, any consent that may have been expressed is without legal effect. The sexual act may then be classified as an assault, even though no physical coercion or violence was involved. This is the core of the doctrine's significance in criminal cases: coercion is not a precondition for criminal liability where the victim was unable to consent validly.
The doctrine attracted international attention in connection with the Stubblefield case in the United States, in which a university professor was convicted of sexual assault against a man with severe cerebral palsy. A central part of the case concerned precisely whether the victim possessed consent capacity — and the court concluded that he did not, which invalidated any alleged consent and formed the basis for the conviction.
