Under section 25(3), when is a person justified in using force likely to cause death or grievous bodily harm?

The justification for using force that is likely to cause death or grievous bodily harm under section 25(3) hinges on the perception and belief of the individual involved. A person is justified in using such force when they believe on reasonable grounds that it is essential for their own self-preservation. This incorporates the idea that an individual is entitled to protect themselves from a perceived imminent threat to their life or safety.

The emphasis on "reasonable grounds" indicates that the belief should be based on a rational assessment of the situation, one that an average person might also perceive as threatening. This principle is fundamental in self-defense laws and aims to allow individuals the right to defend themselves without facing legal repercussions, provided their belief in the need to protect themselves was reasonable and justified given the circumstances.

In contrast, the other options do not align with the legal provisions as closely. Excessive force is not justified under the law. Similarly, while protecting property is important, the application of force likely to cause death or grievous bodily harm is generally reserved for life-threatening situations rather than property disputes. Acting under duress may also invoke different legal considerations and defenses, but it does not specifically pertain to the justification found in section 25(3) regarding self-preservation.