Postentry quarantine is a pest risk mitigation measure designed to enable importers to move planting stock representing a high risk of plant pest dissemination from designated foreign sources into the U.S. The planting stock authorized under postentry quarantine is specified in the Code of Federal Regulations 7 CFR 319.37-7
. Only plant species from foreign countries designated in said regulation are authorized. Final destination is limited to those States with a Postentry Quarantine Agreement. The length of the quarantine period is generally two years with exceptions for some plant species as given in the regulation.