The True Meaning of the Council of State Assembly of Tax Law Chambers’ (VDDK) Decision Resolving the Conflict Among Regional Administrative Court Rulings on the ATV–Tractor Distinction: The “Method of Examination” in Tax Litigation

By its decision no. 2026/2 E., 2026/9 K. dated 10.06.2026 (the “Decision”), published in the Official Gazette dated 18.07.2026, the Council of State Assembly of Tax Law Chambers (the “VDDK”) resolved the divergence of opinion that had arisen among the regional administrative courts (the “RACs”) as to the tax treatment of ATV-type vehicles for special consumption tax (“SCT”) purposes.

The perhaps overlooked yet critical aspect of the Decision lies in the boundary the VDDK drew on this occasion: the VDDK made no determination on the merits as to whether the vehicles are to be treated as tractors (87.01) or as ATVs (87.03); finding that the dispute and the conflict lay not in the tariff classification of the vehicles but in the method of examining the disputes, it confined its assessment solely to that dimension.

Proceeding from this point, the VDDK did not say “the vehicles fall under such-and-such position”; rather, it held that “the position under which the vehicles fall must be determined by assessing the Customs Tariff Explanatory Notes (izahname) and the Explanatory Notes (açıklama notları), obtaining an expert (bilirkişi) examination where necessary, and the lawfulness of the penalized assessment must be reviewed accordingly.” The Decision is therefore, in essence, a procedural ruling clarifying the scope of the principle of ex officio investigation in tax adjudication.

Background to the Dispute

At the root of the dispute lies a substantial difference in tax consequences arising from the tariff distinction. When the vehicles in question are classified as “tractors” under Customs Tariff Statistics Position (CTSP / GTİP) 87.01 they are not subject to special consumption tax; whereas when classified under position 87.03 as “four-wheeled all-terrain vehicles – ATVs” they become subject to SCT.

In the disputed files, vehicles defined as “T3–Tractor” in their type-approval certificates were imported classified as tractors under CTSP 87.01 and sold to end consumers without SCT being charged; the administration, however, treated those vehicles as falling under position 87.03 (as ATVs), assessed SCT ex officio, and imposed a tax-loss penalty equal to the amount of the tax together with recidivism (tekerrür) provisions. The legal basis for the classification is formed by Special Consumption Tax Law no. 4760, Customs Law no. 4458, together with the Customs Tariff Schedule Explanatory Notes (İzahname) (Series No. 3) and the Explanatory Notes (Açıklama Notları) (Series No. 6).

The Explanatory Notes require that, for agricultural/forestry tractors to fall under subheadings 8701.91.10–8701.95.90, all eight separate technical characteristics be met cumulatively; a vehicle failing to meet even one of these characteristics is to be classified under position 87.03 (ATV). This is precisely where the technical core of the dispute lies: whether the vehicles meet these eight criteria is a question of factual determination.

Three Conflicting RAC Rulings

The Assembly was faced with three final rulings approaching the same legal question in three different ways:

a) Istanbul RAC 8th Tax Chamber — (28/10/2025, E:2025/1025, K:2025/2002)

The Chamber examined the merits of the dispute in the context of the relevant provisions of the Customs Law and the tariff Explanatory Notes, determined the vehicles’ place within the customs tariff position by assessing their characteristics, accepted the vehicles as falling under 87.03 (ATV), and, concluding on that basis that the penalized assessment involved no unlawfulness, dismissed the appeal.

b) Istanbul RAC 3rd Tax Chamber — (11/06/2025, E:2025/1326, K:2025/1454)

In this file the Chamber, proceeding from the fact that the tax examination report underlying the assessment had been prepared solely on the basis of the 87.03.21 CTSP declaration in the import declaration, without seeking the opinion of an expert person or institution as to the vehicle’s technical characteristics and tariff position, found the report to be based on incomplete examination and annulled the penalized assessment.

c) Bursa RAC 1st Tax Chamber — (24/01/2025, E:2024/1358, K:2025/71)

The Chamber held that, owing to the official documents issued by public authorities (T3–Tractor type approval, TSE conformity, registration as a tractor by the notary/traffic registry, etc.) and the established practices, the taxpayer had attained a legally protectable legitimate expectation that the vehicles were not subject to SCT; on that ground, finding the retrospective penalized assessment contrary to equity, it annulled the assessment.

The Core of the Decision: What Did the Assembly Actually Rule On?

The backbone of the Decision is the following finding, in which the VDDK itself drew the boundary of its own assessment:

“… considering the results reached by the judicial authorities in their review of lawfulness, it has been concluded that, for the purposes of the assessment the Council of State Assembly of Tax Law Chambers will make in resolving this request for the elimination of the conflict, the conflict arose in the method of examining the disputes and that the assessment must be confined to this dimension of the legal dispute; in this context, this decision of the Assembly does not contain any assessment as to which G.T.İ.P. number the vehicles subject to the disputes fall under.”

This paragraph is the interpretive key that determines how the Decision is to be read. The Assembly distinguishes two matters. First, it finds that each file before it involves vehicles of different make, model and characteristics, and that the examination reports underlying the penalized assessments were drawn up in respect of different taxpayers and for different periods. In other words, the files are not factually identical. It is precisely for this reason that the Assembly deliberately refrains from establishing a single ruling on the merits applicable to all files (“these vehicles are tractors” or “these vehicles are ATVs”).

The matter that actually gives rise to the conflict is not that the three chambers think differently about the vehicles’ position, but that they followed different methods as to how they examined the dispute. The Assembly, too, confined its intervention to this level — to the path leading to the result, not to the result itself.

 The Method Established: The Principle of Ex Officio Investigation and the Duty to Examine

The Assembly bases the solution on the principle of ex officio investigation set out in Article 20 of the Administrative Procedure Act no. 2577. Under this principle, the administrative courts have full authority to make the legal characterization of the event, to determine the applicable rule of law and to reach the legal solution; at the same time, in determining the factual aspect of the event, they may carry out every kind of examination and investigation of their own motion, and may even investigate factual elements to which the parties have not referred at all.

The conclusion the Assembly draws from this is clear: in order to establish the true nature of the factual event put forward in the claims and defences, the courts are obliged — not contenting themselves with the parties’ statements — to gather the material evidence and findings, including by resorting to an expert (bilirkişi) examination, and to exhaust every avenue of examination and investigation necessary for resolving the dispute. In the concrete context, this means first determining — where necessary through an expert — the position under which the vehicles fall according to the technical criteria in the Customs Tariff Explanatory Notes and the Explanatory Notes, and only after this determination reviewing the lawfulness of the penalized assessment. It would not be wrong to say that this conclusion also implicitly points to the following: the administration, as the defendant in tax cases, is likewise “merely” a party to these disputes. Accordingly, for example, the existence of a tax-technical report on the matter and/or the fact that such report relies on an opinion obtained from another public institution is not, on its own, a sufficient criterion for the characterization.

The wording in the conclusion section of the Assembly’s decision sets out the method beyond doubt: the resolution of the disputes depends “first and foremost” on the correct characterization of the taxable event and its elements (in the concrete cases, the determination of the GTİP under which the vehicles are to be classified); this characterization/determination must be carried out by assessing the relevant technical regulations (in the concrete cases, the Explanatory Notes) and, where necessary, by obtaining an expert examination, and the lawfulness of the assessment must be reviewed thereafter and in accordance with these determinations.

 Assessment

In establishing the procedural standard to be followed, we see that the Assembly adopted the “report based on incomplete examination” reasoning of one of the three chambers, the Istanbul 3rd Tax Chamber: an assessment made — and the conclusions built — solely on the basis of the CTSP declaration in the import declaration or of the buyer’s statement and images of the vehicles, without technical examination and expert opinion, cannot be said to rest on adequate investigation. By contrast, the legitimate-expectation axis on which the Bursa Chamber relied was not brought to the fore in the Decision; the Assembly built its solution not on legal certainty but on the investigation of the material truth.

It is also important, from a practical standpoint, to appreciate that the Decision does not resolve the SCT/GTİP merits: it would be erroneous to read into this Decision a meaning such as “the Council of State has accepted that the vehicles are (or are not) tractors (or ATVs).” The Decision disciplines not the result, but the method of reaching the result.

In this respect, the Decision carries concrete implications not only for companies that import, distribute or sell ATVs/UTVs, all-terrain vehicles and tractor-like vehicles and for taxpayers facing SCT assessments on such vehicles, but for all taxpayers and, indeed, for the tax and customs administration, which is the other “party” to tax disputes:

• Penalized assessments that do not contain a technical examination and an expert opinion are, on that ground alone, open to challenge as being “based on incomplete examination” and may be annulled.
• It would be an appropriate approach for taxpayers to submit, in their statements of claim, technical evidence addressing the technical points one by one and to request an expert examination, and bearing in mind disputes that may arise in the future — to prepare in advance, as of today, the technical and other supporting documentation (certificates and TSE conformity records, contracts, documents relating to internal operations, etc.) relevant to the criteria or practices that may become the subject of dispute.