3/24/1990 Internal Advice No. 53/89, Request for reconsideration of Headquarters Ruling Letter 084811 and New York Ruling Letter 834692 3/28/1990 Revocation of Headquarters Ruling Letter 084811 5/1/1990 Modification of Headquarters Ruling Letter 086706, dated March 28, 1990, revoking Headquarters Ruling Letter 084811; choker grapples, slack-pulling carriages 5/23/2017 Request for Internal Advice; classification of negative brakesPort DirectorU.S. Customs and Border ProtectionPort of Charleston200 East Bay StreetCharleston, SC 29401Attn Dionne Durham 10/16/2009 Tariff classification of transmission assemblies 12/20/2010 Application for Further Review of Protest No. 0901-09-100468; overhead tube suspension