In the Philippines, child seat regulations differ based on the child's age and size. Children under 3 years old must be secured in a car or booster seat. Those aged 4 to 12 should use a booster seat or seat belt, depending on their height and weight. These rules apply to both private and public transport. It's advisable to bring your own child seat or booster, as they may not be easily available for rent or use in the Philippines.