What resource outlines how to follow the law with specifics on APHIS-approved methods and requirements?

The correct answer is rooted in the nature of how resources are structured to provide guidance on regulatory compliance. Program Standards are designed to offer clear directives and specific methodologies for organizations and individuals to follow in accordance with the law. They detail the approved methods and requirements that align with the regulations set forth by governing bodies like the Animal and Plant Health Inspection Service (APHIS).

While the Code of Federal Regulations is a comprehensive compilation of rules, it may not provide the specific operational details that Program Standards do. Similarly, the NVAP Reference Guide and the Animal Health Inspection Summary serve different purposes; the former focuses on vaccination protocols and guidelines, and the latter summarizes overall animal health inspection data without delving into specific procedural instructions. Therefore, Program Standards are the most relevant resource for understanding how to comply with APHIS requirements effectively.