El titular de la autorización revisa el acto comunicado.

That is a very common confusion. Titular can mean different things depending on context.

In this sentence, el titular means the holder, the owner, or the person officially entitled to something. In legal and administrative Spanish, it often refers to the person who holds a licence, permit, account, right, position, etc.

So here el titular de la autorización means the holder of the authorisation.

Yes, titular can also mean headline in journalism, but not in this sentence.

Spanish usually expresses this kind of relationship with de.

So:

• el titular de la autorización = the holder of the authorisation
• literally: the holder of the authorisation

English often stacks nouns together, but Spanish generally does this less often. Instead of putting two nouns directly together, Spanish commonly uses:

• de = of
• or sometimes an adjective

So de la autorización is the normal, natural way to say it.

Spanish uses definite articles much more often than English.

In this sentence:

• El titular = The holder
• de la autorización = of the authorisation
• el acto comunicado = the communicated/notified act

Even where English might drop an article in some contexts, Spanish often keeps it. In formal or legal Spanish, this is especially common because the wording is precise and specific.

Revisa is the third person singular of the present indicative of revisar.

So it means:

• he reviews
• she reviews
• it reviews
• the holder reviews

Because the subject is el titular, which is third person singular, revisa matches it.

Revisar usually means things like:

• to review
• to check
• to inspect
• to examine

The exact English translation depends on context.

On its own, yes: revisa can also be the tú imperative of revisar, meaning check! or review!

But in this sentence, it is clearly not a command because the sentence has an explicit subject:

• El titular de la autorización revisa...

That structure strongly tells you it is a statement in the present tense:
The holder of the authorisation reviews...

Grammatically, yes, acto often corresponds to act, but in this kind of sentence it is probably being used in a formal, administrative, or legal sense.

In legal/official Spanish, acto can refer to:

• an official act
• an administrative act
• a formal action or decision

So although acto looks like act, you should be careful: in legal language it may have a more specific technical meaning than everyday English act.

Here comunicado is most likely a past participle used as an adjective.

It comes from comunicar = to communicate, to notify, to inform

So el acto comunicado means something like:

• the communicated act
• the notified act
• the act that has been communicated

In formal/legal English, notified may sound more natural than communicated, depending on the context.

Because it is functioning like an adjective that describes acto.

Spanish adjectives often come after the noun:

• el acto comunicado
• literally: the act communicated

That is a very normal position, especially in formal writing and when the adjective is descriptive or restrictive.

If you move many adjectives before the noun in Spanish, the meaning or tone can change. Here, acto comunicado is the straightforward and natural order.

Because comunicado has to agree with acto, and acto is:

• masculine
• singular

So the adjective/participle must also be masculine singular:

• acto comunicado

If the noun were feminine singular, it would be comunicada:

• la resolución comunicada

If it were masculine plural:

• los actos comunicados

Agreement is very important in Spanish.

Because el acto comunicado is not a person.

Spanish uses the personal a mainly with specific human direct objects, and sometimes with pets or personified things.

Compare:

• El titular revisa el acto comunicado.
  No a, because acto is a thing/concept.

• El titular revisa a la solicitante.
  Here you would use a, because la solicitante is a person.

Yes.

Titular is one of those nouns that often keeps the same form for masculine and feminine, and the article shows the gender:

• el titular = the male holder
• la titular = the female holder

So if the holder were female, you could say:

• La titular de la autorización revisa el acto comunicado.

In some formal texts, masculine forms may also be used generically, but if the person is known to be a woman, la titular is completely normal.

Not really. It sounds formal, bureaucratic, or legal/administrative.

Words like:

• titular
• autorización
• acto
• comunicado

all suggest official language rather than casual conversation.

In everyday Spanish, people might use simpler wording depending on the exact meaning, for example with words like permiso, documento, decisión, aviso, etc. But in official contexts, this more technical style is very common.

Spanish word order is more flexible than English, but this sentence is already in the most neutral and clear order:

• El titular de la autorización revisa el acto comunicado.

That is a standard subject + verb + object structure.

You could change the order in some contexts for emphasis, but in formal writing this version is the most natural and easiest to process.

They can overlap, but they are not always identical.

• autorización often sounds more formal, official, or legal
• permiso can be more general and often feels less technical

In administrative language, autorización is very common for an official authorisation granted by an authority.

So in this sentence, autorización fits the formal register better than permiso.

A fairly literal version would be:

The holder of the authorisation reviews the communicated act.

That is grammatical English, but it sounds very formal and slightly awkward outside legal/administrative contexts.

A more natural translation would depend on the exact legal meaning of acto comunicado and revisa, for example:

• The holder of the authorisation reviews the notified act.
• The authorisation holder reviews the notified decision.
• The permit holder examines the communicated act.

The best English version depends on the wider context.