Determine which of the following constitutional provisions is explicitly excluded from the category of Directive Principles of State Policy (Part IV):
1. The explicit mandate requiring the government to actively prohibit the consumption of intoxicating, health-injurious drinks and drugs.
2. The policy instruction directing the state to ensure the provision of early childhood care and education for all children under the age of six.
3. The patriotic obligation mandating that individuals must defend the nation and render national service when called upon.
4. The structural mandate requiring the formal separation of the judiciary from the executive branch within public services.