CustomsMobile CustomsMobile is a U.S. Customs (CBP) focused website that provides access to all US Customs Rulings which CBP publishes on CROSS, CBP Notices (CSMS), Harmonized Tariff Schedule of the United States (HTSUS), US Port information, and the Code of Federal Regulations (CFR). CustomsMobile provides this information in a free, fun, and easy to use mobile format. CustomsMobile enables users to perform all import classification, valuation, and entry research on a desktop computer or a smartphone or tablet. Link out to the Trans-Pacific Partnership (TPP).