The situation
A statute the client wants to challenge
A cinema operator with sites in Spain and the Czech Republic has been hit in both countries by changes to a sector levy that applied part-way through the year. Its general counsel wants to know whether a constitutional challenge has any prospect, and asks for an overview of what both constitutional courts have said on retroactivity and equal treatment in levies.
Neither court decides cases like this often, and the decisions are long. Finding the ones on point, reading the reasoning rather than the headnote and working out how a private company can even get the question before each court is where the week goes.
What the research has to settle
The rules behind the answer
- Spain: no direct action for companies
- An action of unconstitutionality against a statute is reserved to named public bodies and office-holders. A company can ask the ordinary court hearing its case to refer a question of unconstitutionality to the Tribunal Constitucional, or bring an amparo appeal for a breach of fundamental rights.
- Czech Republic: through a constitutional complaint
- A company whose fundamental rights were infringed by a final decision can bring a constitutional complaint and join a petition to annul the statute applied in that decision. Ordinary courts can also refer a statute they consider unconstitutional.
- Retroactivity is a matter of degree
- Both courts distinguish laws that reach back to events already completed from laws that change the consequences of situations still running. The overview should sort the decisions along that line.
- Record the test, not only the result
- A rejected challenge can still set out the test a later case meets. The overview should record each decision’s test, outcome, date and type of proceedings.
How it runs in azta
From the question to the document
The question, as you would type it
A levy on cinema operators was changed in the middle of the year with effect from 1 January. What have the Spanish Tribunal Constitucional and the Czech Constitutional Court decided on retroactive tax or levy changes, and how can a private company bring the question before each court?
You start with
A statute the client wants to challenge
- 01
Frame the constitutional question
Describe the levy change and when it applied. azta researches the constitutional provisions and the procedural routes in each country.
Cited research· Free - 02
Search both constitutional courts
Ask for decisions on retroactive and sector-specific levies. azta searches the decisions of the Tribunal Constitucional and the Ústavní soud and links each to its full text.
Case-law search - 03
Build the overview
Ask for a table per court: decision, date, proceedings, test applied and outcome, followed by a short assessment. Edit it in Canvas.
Canvas · Ask azta· Pro You send
An overview of constitutional court decisions on the point, with the route to each court
What you get
An overview of constitutional court decisions on the point, with the route to each court
Case-law overview · draft
Retroactive levy changes: the constitutional case law in Spain and the Czech Republic
Route to the court. In Spain the company cannot challenge the statute directly. It would contest the levy assessment and ask the court to refer the question. In the Czech Republic it would exhaust the ordinary remedies and then bring a constitutional complaint with a petition to annul the provision.
Spanish decisions. The decisions in Table 1 distinguish between a law that reaches back to completed tax periods and one that applies to a period still running. Changes of the second kind were upheld where they were foreseeable and justified.
Czech decisions. The decisions in Table 2 draw a similar line. Our assessment of how the client’s facts fit each line is in Section 4.
Outcomes on your numbers
What azta is worth on this task
Pro pays for itself after
7 minutes a month
At €240 an hour, that is all the time Pro (€27 a month) has to take off your desk to cover its price.
Example figures. Replace them with your own.
- Hours back a year
- 40
- Capacity at your rate
- €9,504
- More constitutional case-law overviews a quarter
- 0.8
- Return on Pro
- 29.3×
- Research
- Drafting
- Your review
A scenario you set, not a promise. The hours that come back go to another client, or deeper into this one.
Want these numbers on your team’s real workload?
Book a demoSources azta searches here
- Tribunal Constitucional
- Ústavní soud
- BOE
- e-Sbírka
What stays with you
- Reading the decisions the overview relies on.
- Judging the prospects and the procedural strategy.
- The advice to the client.
Frequently asked questions
- Does azta hold constitutional court decisions?
- Yes, for the courts in its source register, including the Tribunal Constitucional and the Ústavní soud. The register lists each collection.
- Can it search in Spanish and Czech at once?
- Yes. azta searches each court’s decisions in the original language and answers in yours, with links to the originals.
- Will it predict the outcome?
- No. It sets out what the courts have decided and the tests they used. The assessment of prospects is yours.



