Section 74 defines consent as "if she agrees by choice, and has the freedom and capacity to make that choice" . In the offences of rape, assault by penetration, sexual assault and causing a person to engage in sexual activity without consent, a person (A) is guilty of an offence if (s)he:

Deciding whether a belief is reasonable is to be determined having regard to all the circumstances, including any steps A has taken to ascertain whether B consents (subsection (2) of sections 1-4). It is likely that this will include a defendant's attributes, such as disability or extreme youth. This is a major change in the law and the Act abolishes the Morgan defence of a genuine though unreasonably mistaken belief as to the consent of the complainant. It means that the defendant (A) has the responsibility to ensure that (B) consents to the sexual activity at the time in question. It will be important for the police to ask the offender in interview what steps he took to satisfy him that the complainant consented.