U.S. Customs and Border Protection
Securing America's Borders
CUSTOMS RULINGS ONLINE SEARCH SYSTEM (CROSS)
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DATE RULING CATEGORY TARIFF NO RULING REFERENCE RELATED 9/27/1991 Chimney Pipe Sections of Stainless Steel; Double Walled and Insulated; Ruling 087434, Dated October 18, 1990
References: 087434
 6/21/2004 Internal Advice (IA) 03/013; Steel Pipes
References: 956743, 956790, J82219, D89819, E86977, E86334, I86681, 966963
 8/12/2016 Internal Advice Request; Eligibility of piping spools for preferential duty treatment under NAFTA and marking as goods of Mexico.
References: H039564, H046759
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