2024 19 CFR 151.54 – Testing by Customs laboratory

2023 19 CFR 151.54 – Testing by Customs laboratory

2022 19 CFR 151.54 – Testing by Customs laboratory

2021 19 CFR 151.54 – Testing by Customs laboratory

2020 19 CFR 151.54 – Testing by Customs laboratory

2019 19 CFR 151.54 – Testing by Customs laboratory

2016 19 CFR 151.54 – Testing by Customs laboratory

2015 19 CFR 151.54 – Testing by Customs laboratory

2014 19 CFR 151.54 – Testing by Customs laboratory