Subheading 9002 90 of the Combined Nomenclature covers mounted optical elements — lenses, prisms, mirrors and other optical elements — other than objectives for cameras, projectors or photographic enlargers (9002 11 and 9002 19) and other than filters and their parts. The subheading covers achromatic doublets and triplets, right-angle and roof prisms, parabolic mirrors, cylindrical lenses, Fresnel lenses and lens assemblies used in measurement instruments, binoculars, endoscopes, gun sights, laser systems and projection equipment. The defining classification criterion is the mounted state: unmounted optical elements are classified under heading 9001, while mounted elements — those set in a metal or plastic frame, threaded mount or any other mechanical housing enabling direct assembly into an instrument — fall under heading 9002. Classification is performed in accordance with the General Rules for Interpretation (GRI), rules 1 and 6, taking into account the HS Explanatory Notes to headings 9001 and 9002. In cases of doubt, particularly for elements intended for dual-use or defence equipment, it is advisable to apply for a Binding Tariff Information (BTI) decision from the competent customs authority. A BTI decision is binding for 3 years throughout the EU.

Importing mounted optical elements under subheading 9002 90 into the EU requires compliance with the Union Customs Code (Regulation (EU) No 952/2013). The importer must hold an EORI number and lodge a customs declaration with the correct 10-digit TARIC code. Optical elements as individual components do not require CE marking in their own right — the CE obligation applies to the finished instrument (e.g. laser device, endoscope, medical device), not to the individual optical component. Where mounted optical elements are incorporated into medical devices, the finished product must comply with Regulation (EU) 2017/745 (MDR) or Regulation (EU) 2017/746 (IVDR). Components for Class 3B or Class 4 laser systems may be subject to the Machinery Regulation (EU) 2023/1230 at the finished product level. Optical elements for dual-use systems (e.g. fire-control systems, military periscopes) may require an export licence under Regulation (EU) 2021/821. The importer should hold technical documentation confirming optical parameters: glass or material type (e.g. BK7, ZnSe, silicon, germanium), anti-reflection coatings, focal length, aperture and spectral range. Regulation (EU) REACH No 1907/2006 may apply where coatings contain SVHC substances. Required documents: commercial invoice with technical description, transport document, optical parameter specification, proof of origin for preferential rates.

Mounted optical elements under subheading 9002 90, when used in information technology, telecommunications and instrumentation products, may qualify for an MFN rate of 0% under the WTO Information Technology Agreement (ITA), to which the EU, USA, Japan, China and over 80 countries are signatories. Whether a specific 10-digit TARIC code falls within the ITA product coverage must be verified in the TARIC database of the European Commission (ec.europa.eu/taxation_customs/dds2/taric), as ITA coverage for optical elements depends on the detailed product description and intended use. Preferential tariff rates under EU FTAs (CETA, EU-Japan EPA, EU-UK TCA, KOREU, GSP and GSP+) may be available subject to rules of origin and presentation of a EUR.1 certificate or an exporter statement under the REX system. For consignments exceeding EUR 6,000 in value, a EUR.1 certificate issued by the customs authority of the exporting country is required. Products of Chapter 90 are not subject to the Carbon Border Adjustment Mechanism (CBAM) under Regulation (EU) 2023/956. Imports from countries subject to EU sanctions must be verified against current sanctions regulations. EU autonomous tariff suspensions under Regulation (EU) 2021/2283 may temporarily reduce rates for certain optical components used in manufacturing. VAT at the national rate applies on import. Importers should verify current rates in TARIC before each importation.

Subheading CN 9002 90 is a residual subheading covering mounted optical elements that are neither objectives (9002 11/19) nor filters (9002 20). It includes mounted prisms, mirrors, diffraction gratings, beam splitters, and collimators. These elements are widely used in laboratories, the laser industry, and imaging systems. Classification requires the element to be mounted – even a simple metal frame qualifies the product as mounted under this subheading.