Consent occurs when one person voluntarily agrees to the proposal or desires of another. It is a term of common speech, with specific definitions as used in such fields as the law, medicine, research, and sexual relationships. Consent as understood in specific contexts may differ from its everyday meaning. For example, a person with a mental disorder, a low mental age, or under the legal age of sexual consent may willingly engage in a sexual act that still fails to meet the legal threshold for consent as defined by applicable law.
United Nations agencies and initiatives in sex education programs believe that teaching the topic of consent as part of a comprehensive sexuality education is beneficial. Types of consent include implied consent, express consent, informed consent and unanimous consent.
Types
An expression of consent is one that is unmistakably stated, rather than implied. It may be given in writing, by speech (orally), or non-verbally, e.g. by a clear gesture such as a nod. Non-written express consent not evidenced by witnesses or an audio or video recording may be disputed if a party denies that it was given. Implied consent is consent inferred from a person's actions and the facts and circumstances of a particular situation (or in some cases, by a person's silence or inaction). Examples include unambiguously soliciting or initiating sexual activity or the implied consent to physical contact by participants in a hockey game or being assaulted in a boxing match. Informed consent in medicine is consent given by a person who has a clear appreciation and understanding of the facts, implications, and future consequences of an action. The term is also used in other contexts, such as in social scientific research, when participants are asked to affirm that they understand the research procedure and consent to it, or in sex, where informed consent means each person engaging in sexual activity is aware of any positive statuses (for sexually transmitted infections and/or diseases) they might expose themselves to. Unanimous consent, or general consent, by a group of several parties (e.g., an association) is consent given by all parties. Substituted consent, or the substituted judgment doctrine, allows a decision maker to attempt to establish the decision an incompetent person would have made if they were competent.
In international law, consent involves states, not individuals. Consent is a crucial principle of international law that necessitates the agreement of all relevant parties for any changes in rules to be legally binding. However, some legal scholars propose that a consensus among states, rather than the explicit consent of each state, may be the standard by which a rule is considered obligatory and enforceable.
Internet and digital services
The concept of end-user given consent plays an important role in digital regulations such as the European General Data Protection Regulation (GDPR). The GDPR (Article 6) defines a set of different legal bases for lawful processing of personal data. End-users’ consent is only one of these possible bases. However, as a result of the GDPR enforcement (in 2018) and other legal obligations, data controllers (online service providers) have widely developed consent-obtaining mechanisms in recent years. According to the GDPR, end-users' consent should be valid, freely given, specific, informed and active. But the lack of enforceability regarding obtaining lawful consents has been a challenge in the digital world. As an example, a 2020 study, showed that the Big Tech, i.e. Google, Amazon, Facebook, Apple, and Microsoft (GAFAM), use dark patterns in their consent obtaining mechanisms, which raises doubts regarding the lawfulness of the obtained consent.
Tort
Consent can be either expressed or implied. For example, participation in a contact sport usually implies consent to a degree of contact with other participants, implicitly agreed and often defined by the rules of the sport. Another specific example is where a boxer cannot complain of being punched on the nose by an opponent; implied consent will be valid where the violence is ordinarily and reasonably to be contemplated as incidental to the sport in question. Express consent exists when there is oral or written agreement, particularly in a contract. For example, businesses may require that persons sign a waiver (called a liability waiver) acknowledging and accepting the hazards of an activity. This proves express consent, and prevents the person from filing a tort lawsuit for unauthorised actions.