Při úlevě od poplatku má držitel psa ohlašovací povinnost.

Here při means something like in the case of, when there is, or during. In this sentence, it introduces the circumstance under which the obligation applies.

Při takes the locative case, which is why the next word is úlevě, not the dictionary form úleva.

Because úleva follows při, and při requires the locative.

• dictionary form: úleva
• locative singular: úlevě

So při úlevě = in the case of a relief / when there is a relief.

The preposition od takes the genitive case, so poplatek changes to poplatku.

• nominative: poplatek
• genitive: poplatku

The phrase úleva od poplatku means relief from the fee. This is a fixed and very common administrative pattern:

• osvobození od daně = exemption from tax
• sleva z ceny = discount from the price
• úleva od poplatku = relief from the fee

Držitel psa is a formal, legal-style expression. Literally it means holder/keeper of a dog.

It is close to owner of a dog, but not always exactly the same. In legal or administrative language, držitel can mean the person who officially keeps or is responsible for the dog, even if everyday speech might more naturally use majitel.

So:

• majitel psa = owner of a dog
• držitel psa = holder/keeper of a dog, often more official/legal

Because psa is the genitive singular of pes.

After a noun like držitel, Czech often uses the genitive to show what someone holds, owns, or is connected with.

• držitel psa = holder of a dog
• majitel domu = owner of a house
• správce budovy = manager of a building

So psa here is not the object of a verb; it is part of the noun phrase držitel psa.

It is a formal expression meaning a reporting obligation or a duty to notify/report.

• povinnost = obligation, duty
• ohlašovací = reporting / notification-related

The adjective ohlašovací comes from the verb ohlašovat = to report / announce / notify.

So the whole phrase means that the dog holder must formally report something to the authorities. This kind of wording is very common in official regulations.

This is a very common formal Czech pattern:

• mít povinnost = to have an obligation / to be required to

So:

• má ohlašovací povinnost = has a reporting obligation
• less formally, this could be reworded with a verb like musí něco ohlásit = must report something

The version with má ... povinnost sounds more bureaucratic, legal, and impersonal, which fits this sentence.

Yes. Czech word order is flexible, and this sentence is arranged in a way that sounds typical for official language.

The sentence starts with Při úlevě od poplatku, which sets the condition first: in the case of fee relief.

You could also say:

• Držitel psa má při úlevě od poplatku ohlašovací povinnost.

That would still be grammatical and would mean basically the same thing. The original order simply puts more focus on the condition.

Because Czech has no articles. It does not have separate words corresponding directly to English a/an and the.

So in this sentence:

• držitel psa could mean the dog holder, a dog holder, or just dog holder
• poplatku could mean the fee or a fee

The exact interpretation comes from context.

Not necessarily. Úleva usually means relief, reduction, or concession, so it can suggest the fee is reduced or eased, not always completely removed.

A full exemption is often expressed more clearly as:

• osvobození od poplatku = exemption from the fee

So úleva od poplatku may be partial relief, depending on the legal context.

It is grammatical and natural, but it sounds official, administrative, and legal rather than conversational.

In everyday Czech, people would probably say something simpler, for example with a verb instead of the abstract noun phrase:

• Když máte úlevu od poplatku, musíte to nahlásit.

That is much more direct. The original sentence is the kind of wording you would expect in a regulation, ordinance, or official notice.