Codex Alimentarius Commission is the primary authority because it is the joint FAO/WHO body that develops international food safety standards, guidelines, and codes of practice used as the benchmark for safe trade. These standards cover areas such as permissible contaminant levels, pesticide residues, food labeling, and hygiene practices, providing a harmonized reference that countries can adopt in their national regulations. In international trade, the World Trade Organization relies on Codex standards when interpreting sanitary and phytosanitary measures, making Codex the technical authority behind many trade-related food safety rules. The FAO and WHO play crucial roles as sponsors and sources of scientific input, but they are not the primary standard-setting body themselves; Codex is.

FSIS Export Certification provides official documents that certify meat and poultry products meet the importing country’s requirements for export. These certificates accompany shipments and attest that the products have been inspected and meet the destination’s standards, helping foreign authorities trust that the items comply with their import rules and facilitating international trade. It isn’t about domestic dairy plant hygiene, approving animal feeds for home use, or regulating seafood proteins, which involve other programs and agencies.

A sanitary certificate or health certificate is a document that accompanies animal shipments to verify their health status and freedom from specified diseases, ensuring they meet the importing country’s requirements. The agency responsible for issuing this certificate is USDA APHIS (Animal and Plant Health Inspection Service), which oversees animal health programs and the regulatory framework for importing and exporting animals and animal products. In practice, the exporting country’s official veterinarian typically prepares the certificate, and APHIS provides endorsement or authorization for entry into the United States. Other agencies don’t issue this type of certificate: FDA handles safety of foods, drugs, and cosmetics; CDC handles public health surveillance and disease control; and FSIS regulates meat, poultry, and egg products within the U.S. and issues different kinds of permits rather than general sanitary certificates for import.

FDA's role in food safety is to ensure foods sold in the United States are safe, wholesome, sanitary, and properly labeled. This responsibility covers most foods for human consumption and also pet foods under FDA oversight, with safety standards, labeling rules, and inspections guiding what reaches consumers. Meat, poultry, and egg products are not within FDA's domain; they are regulated by the USDA's Food Safety and Inspection Service. The statement about FDA ensuring safe, wholesome, sanitary, and properly labeled foods accurately reflects its mission, while the other options mix up FDA's scope or misstate which agency handles certain products.