Declaration elements for customs goods typically include specifications/models, chemical composition, technical parameters, intended use, etc. Different declaration elements help distinguish corresponding HS codes for different commodities.

For example, automobiles with different specifications/models may face vastly different import tariffs due to variations in engine displacement. Similarly, chemical reagents with different molecular structures must be classified under appropriate HS codes based on primary/secondary components and their proportions.

Likewise, products with different technical parameters affect commodity classification. For instance, low-power generators may require mandatory certification inspections by national inspection authorities upon import, while high-power generators might be exempt. Product usage also creates significant distinctions - identical items for household versus industrial use may face vastly different import license requirements or tariff preferences.

Since declaration elements directly determine commodity classification in every import/export declaration, we must prepare all documentation thoroughly to ensure the smoothest possible customs clearance process.