According to professional standards, what must a rescuer comply with?

The correct choice emphasizes the importance of adhering to a comprehensive set of regulations and guidelines that govern rescue operations. Rescuers are expected to comply with national standards, state regulations, and regional protocols, ensuring that they are following best practices that encompass a wide range of safety measures and operational procedures.

This broader compliance is crucial because it ensures consistency in training, techniques, and safety practices across various jurisdictions. By adhering to a unified set of standards, rescuers can improve coordination during multi-agency responses and enhance the overall effectiveness and safety of rescue operations. Compliance with national and state regulations also helps protect both rescuers and victims by creating a common framework within which emergency services operate, thus minimizing risks and improving outcomes during rescue situations.

The other options lack the comprehensiveness required for effective rescue operations. Local protocols may not cover all necessary safety standards, federal regulations alone might not address state or regional nuances, and international standards may not always be applicable or recognized in local contexts.