Which legally allows parents to withhold life-sustaining treatment from a terminally ill child?

In many jurisdictions, laws such as the "Best Interests Standard" permit parents to withhold life-sustaining treatment from a terminally ill child if it is determined that such treatment would not improve the child’s quality of life or alleviate suffering. These decisions often require medical consensus and may involve ethical considerations, ensuring that the child's welfare is prioritized. Additionally, some states have specific statutes regarding end-of-life care that guide these decisions.