6203.19.90.30 - Waistcoats imported as parts of suits (359)

This HTS classification covers waistcoats that are imported as integral components of men's or boys' suits. These waistcoats are specifically designed to be worn with matching suit jackets and trousers, forming a complete suit ensemble. They are not classified as standalone garments but rather as parts of a larger tailored outfit, typically made from woven textile materials.

Distinguishing this category from its siblings is crucial for accurate classification. While 6203.19.90.10 pertains to the suit jackets themselves and 6203.19.90.20 covers the trousers, breeches, and shorts that form part of a suit, this node specifically addresses the waistcoat. The defining characteristic is its role as the third piece of a three-piece suit, intended to be worn under the jacket. All these sibling categories fall under the broader umbrella of "Suits" within the "Of other textile materials" designation, indicating they are not exclusively made of cotton but can comprise various woven fabrics.

As this is a leaf node, there are no further subcategories within 6203.19.90.30. Therefore, the classification relies on the precise definition of a waistcoat imported as part of a suit. Importers must ensure that the waistcoat is intended for use with a matching suit jacket and trousers to qualify for this specific HTS code. The physical characteristics and intended function as part of a coordinated suit are paramount for correct identification.