Rectificamos siempre que el presentador lo permita.

It is related, but in everyday Spanish rectificar often means to correct what was said, to amend, or sometimes to backtrack/retract.

So rectificamos here most naturally means something like:

• we correct ourselves
• we make a correction
• we retract that
• we set the record straight

English rectify exists, but it sounds more formal and is not always the most natural translation in normal conversation.

Spanish often drops subject pronouns because the verb ending already shows who the subject is.

• rectifico = I correct
• rectificas = you correct
• rectificamos = we correct

So Rectificamos already means we correct without needing nosotros.

You could say Nosotros rectificamos..., but that usually adds emphasis, contrast, or clarity, for example:

• Nosotros rectificamos, ellos no.
  We correct ourselves; they don’t.

Grammatically, it is present indicative. But in Spanish, the present tense is often used for:

• habitual actions
• general rules
• sometimes even future-like meaning, depending on context

So this sentence can feel like a general policy:

• We correct ourselves whenever / as long as the presenter allows it.

It is not necessarily talking about this exact moment only.

Siempre que is a fixed expression. Its meaning depends on context.

Common meanings are:

• whenever
• as long as
• provided that

In this sentence, because it is followed by the subjunctive (permita), it has a conditional sense:

• as long as
• provided that

So here it does not mean a simple literal always that.

Compare:

• Siempre que viene, trae flores.
  Whenever he comes, he brings flowers.
  (repeated real action)

• Iremos siempre que podamos.
  We’ll go as long as we can / if we can.
  (condition, uncertainty)

Because siempre que can trigger the subjunctive when it introduces a condition or something not guaranteed.

Here, the presenter’s permission is not presented as a fact. It is a condition:

• Rectificamos siempre que el presentador lo permita.
  We correct ourselves, provided that the presenter allows it.

That is why Spanish uses:

• permita = present subjunctive

not

• permite = present indicative

A useful contrast:

• Siempre que el presentador lo permite...
  sounds more like whenever the presenter allows it as a repeated factual situation

• Siempre que el presentador lo permita...
  means as long as / provided that the presenter allows it

It comes from the verb permitir.

Present subjunctive:

• yo: permita
• tú: permitas
• él/ella/usted: permita
• nosotros: permitamos
• vosotros: permitáis
• ellos/ustedes: permitan

So in el presentador lo permita, the subject is el presentador, and the verb form is permita.

Lo is a direct object pronoun. Here it means something like:

• it
• that
• doing so

In other words, lo stands for the action or thing being allowed. In context, it most likely refers to rectifying / making the correction.

So the structure is basically:

• the presenter allows it
• where it = the correction / our correcting ourselves

Spanish often uses lo to refer to an idea, a situation, or something already understood from context.

Good question. Nos lo permita would make the meaning more explicit:

• provided that the presenter allows us to do it

In the original sentence, nos is simply left out because the idea can already be understood from the context.

So:

• lo permita = allows it
• nos lo permita = allows us to do it / allows it to us

Spanish often leaves out elements that are obvious from context.

In Spain, el presentador usually means a presenter, host, or TV/radio anchor.

Depending on context, it could be:

• a TV presenter
• a radio host
• a programme host
• someone presenting an event

So it is a very natural word in Peninsular Spanish.

Yes. A very common alternative would be:

• Rectificamos siempre que el presentador nos lo permita.
• Rectificamos siempre que el presentador permita que rectifiquemos.

The second version is more explicit because it literally says:

• provided that the presenter allows us to correct ourselves

The original sentence is shorter and more compact, but the meaning is the same.

Yes, in many contexts you could. Both can mean:

• as long as
• provided that

So this would also work:

• Rectificamos siempre y cuando el presentador lo permita.

That version can sound slightly more emphatic or formal to some speakers, but both are natural.

By default, it sounds like a general rule, policy, or habitual stance:

• We correct ourselves as long as the presenter allows it.

If you wanted a clearly one-time future meaning, Spanish might also say:

• Rectificaremos siempre que el presentador lo permita.
  We will correct ourselves provided that the presenter allows it.

So the original sentence feels broader and more general.