Limits on reasonableness

The court first defined what types of force could be considered reasonable in the circumstances, the court held that in order for corporal punishment to be considered reasonable it could only be used for corrective purposes against children capable of appreciating it, could only be "transitory and trifling" in nature, and could not be done in a degrading or harmful manner. The court ruled that in order to be protected by section 43 and not be considered assault, corporal punishment must:

• be done by a parent or someone in the standing of a parent (effectively outlawing corporal punishment in schools),
• only be used against children between the ages of two and twelve,
• not be conducted in a manner that either causes or has the potential to cause harm, including bruising or marks,
• not be used out of frustration, loss of temper, or because of the caregiver's abusive personality,
• not be conducted with objects, like belts or rulers,
• not hit the child on the head
• not be done in a manner that is otherwise degrading, inhumane, or harmful, and
• not be used against children with disabilities that make them incapable of appreciating the punishment.

Section 7

Section 7 protects individuals from violation of their personal security. McLachlin found that there was no violation of the section. The Crown had conceded that the law adversely affected the child's security of person, so the issue was whether the violation offended a principle of fundamental justice. The Foundation proposed three claims as mentioned above. McLachlin rejected the first claim that it failed to give procedural protection as children receive all the same protection as anyone else. On the second claim, she rejected that the "best interests of the child" is a principle of fundamental justice as there is no "consensus that it is vital or fundamental to our societal notion of justice".

On the third, she rejected the claim that the law is vague and overbroad on grounds that the law "delineates a risk zone for criminal sanction". She examined the meaning of "reasonable under the circumstances" stating that it included only "minor corrective force of a transitory and trifling nature", but it did not include "corporal punishment of children under two or teenagers", or "degrading, inhuman or harmful conduct" such as "discipline by the use of objects", "blows or slaps to the head" or acts of anger. The test is purely objective, McLachlin claimed.

Section 12

Section 12 prevents "cruel and unusual punishment". Citing the standard of showing cruel and unusual punishment from R. v. Smith [1987] 1 S.C.R. 1045 as "so excessive as to outrage standards of decency", McLachlin rejected the claim as the section only permits "corrective force that is reasonable" and thus cannot be excessive by definition.

Section 15(1)

Section 15(1) is the equality guarantee that protects individuals from discrimination. McLachlin examined the claim using the analytical framework from Law v. Canada.

When identifying from whose perspective the analysis must be, McLachlin noted that rather than take the perspective of a young child, which would prove too difficult, it must be viewed from the perspective of a "reasonable person acting on behalf of a child" and apprised of the law.

McLachlin said that the claim hinges on demonstrating the lack of "correspondence between the distinction and the claimant's characteristics or circumstances" (the second contextual factor from the Law v. Canada test). On this point she acknowledged that children need to be protected, and in furtherance of this goal parents and teachers require protection as well. Section 43 decriminalizes "only minimal force of transient or trivial impact" and to remove such protection would be dangerous as it would criminalize acts such as "placing an unwilling child in a chair for a five-minute 'time-out'" which would risk destroying the family.