Ontario frames a caregiver's authority through the Children's Law Reform Act, which recognizes that a parent can consent to another person having care of the child. There is no single government consent form, so a clearly drafted private authorization is the accepted route, and schools will generally accept it as proof of a caregiver's standing. For medical treatment, Ontario's Health Care Consent Act governs who may consent, and a caregiver acting on a parent's written authority is on solid ground for routine and urgent care.
British Columbia is the most explicit province. Section 21 of the Family Law Act directly permits a guardian to authorize another person to exercise parental responsibilities, and section 21(6) contemplates appointment during a temporary absence. BC's Infants Act also anchors the mature-minor doctrine, so a caregiver's authority over an older teen's healthcare is qualified by the child's own capacity to consent.
Alberta uses the Family Law Act language of guardianship and decision-making, amended in March 2021 to speak of parenting and contact. A parent-signed consent lets a non-guardian caregiver exercise day-to-day authority, but Alberta draws a firm line: only a guardian makes major decisions, so a consent form should stay within the delegable everyday matters and not attempt to grant guardian-only powers.
Quebec sits outside this template entirely. The province operates under the Civil Code of Québec with its own regime of parental authority and tutelle, and the terminology and formalities differ substantially from the common-law provinces. A family in Quebec should use a Civil Code instrument rather than this form.