Processed poultry meat and hard-boiled eggs brought into the U.S. from Mexico must now be accompanied by specific government certification documentation or an import permit from the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service, according to import requirements set by U.S. Customs and Border Protection.

The measures were announced after USDA APHIS released new requirements for poultry products coming from countries where Exotic Newcastle Disease is said to exist. Certifications must confirm meat has been cooked to a minimum internal temperature of 165 degrees Fahrenheit. Otherwise, poultry must have the APHIS veterinary services import permit. Thoroughly cooked, hard-boiled eggs from Mexican states other than Sinaloa and Sonora must also be accompanied by a permit.

Poultry products without a USDA APHIS permit will be seized or refused entry, according to CBP.