Коль скоро программный комитет принял решение, регламент выступления изменят.

Коль скоро is a conjunction meaning something like since, seeing that, inasmuch as, or sometimes once.

In this sentence, it introduces the reason/background:

• Коль скоро программный комитет принял решение...
• roughly: Since the program committee has made a decision...

A learner should know that коль скоро is:

• bookish
• somewhat formal
• a little old-fashioned or stylistically elevated

In everyday Russian, you are more likely to hear:

• раз
• поскольку
• так как

So this sentence is grammatically normal, but коль скоро gives it a more formal or literary tone.

Because Russian grammar agrees with the noun комитет, not with the idea of the people inside it.

• комитет = a singular masculine noun
• therefore the past-tense verb is also singular masculine: принял

So:

• программный комитет принял решение = the program committee made a decision

This is different from some varieties of English, especially British English, where collective nouns can sometimes take plural agreement:

• The committee have decided

In Russian, with комитет, singular agreement is the normal choice:

• комитет принял
• not комитет приняли

Because the sentence contains a subordinate clause introduced by коль скоро.

Structure:

• Коль скоро программный комитет принял решение, = subordinate clause
• регламент выступления изменят = main clause

Russian normally separates subordinate clauses with commas. Since the subordinate clause comes first, the comma appears before the main clause begins.

Изменят is 3rd person plural, literally they will change.

But in Russian, 3rd person plural is often used when the doer is unspecified or not important. English often does something similar with:

• they will change
• someone will change
• it will be changed (depending on style)

So here изменят does not necessarily mean that a clearly stated group of people is the grammatical subject. It often means:

• they will change it
• it will be changed

If the sentence explicitly said that the committee itself would do the changing, then you might see:

• ...регламент выступления изменит программный комитет or
• ...программный комитет изменит регламент выступления

But as written, изменят leaves the agent unnamed.

Because изменят is the simple future of a perfective verb: изменить.

In Russian:

• perfective verbs form the future with one word
• imperfective verbs use быть
  • infinitive for the future

Compare:

• изменить → изменят = they will change
• изменять → будут изменять = they will be changing / will change (imperfective)

Here the perfective form is natural because the sentence refers to a completed change as a result of the decision.

Here регламент is in the accusative singular because it is the direct object of изменят.

They will change what?

• регламент

However, for many masculine inanimate nouns in Russian, the accusative singular looks exactly like the nominative singular.

So:

• nominative: регламент
• accusative: регламент

You know it is accusative from its role in the sentence, not from a different ending.

Выступления is most naturally genitive singular here.

It depends on регламент:

• регламент чего?
• выступления

So the phrase means:

• the regulations/time limit/order of the presentation
• literally something like the regulation of the presentation/speech

This is a very common Russian pattern:

• noun + noun in the genitive

Examples:

• план проекта = the plan of the project
• начало встречи = the beginning of the meeting
• тема доклада = the topic of the report

So регламент выступления is a fixed-type noun phrase, not a full verbal construction.

Not necessarily. In conference, meeting, or public-speaking contexts, регламент often means:

• the time limit
• the speaking schedule
• the rules governing the talk
• the format/procedure for a presentation

So регламент выступления could refer to:

• how long the speaker may speak
• the structure of the presentation
• the formal rules for the speech

A literal translation as regulations of the speech is possible, but in many real contexts a more natural English rendering would be something like:

• the presentation time limit
• the speaking regulations
• the format of the talk

Because the sentence describes two events at different times:

1. the committee already made a decision
2. after that, the speaking regulations/time limit will be changed

So the tense sequence is completely natural:

• принял = past, completed decision
• изменят = future, later consequence

This tells us that the decision is treated as something already finished, and the change is the next step.

If the decision were still in the future, Russian would likely use a future form in the first clause too, for example:

• Когда программный комитет примет решение, регламент выступления изменят.

Yes. The sentence is correct, but because of коль скоро, it sounds formal or literary.

More everyday alternatives include:

• Раз программный комитет принял решение, регламент выступления изменят.
• Поскольку программный комитет принял решение, регламент выступления изменят.
• Так как программный комитет принял решение, регламент выступления изменят.

The grammar stays mostly the same; the main difference is style:

• раз = quite conversational
• так как / поскольку = neutral to formal
• коль скоро = more elevated or bookish