Правление предложило новую кандидатуру.

Because the subject, правление, is a neuter singular noun.

In the past tense, Russian verbs agree with the subject in gender and number:

• masculine: предложил
• feminine: предложила
• neuter: предложило
• plural: предложили

So:

• правление предложило = the board proposed

Even though a board is made up of several people, Russian treats правление as a singular neuter noun, so the verb is singular neuter too.

Правление usually means a board, management board, or governing body, depending on context.

It is a noun formed from the idea of governing / administration, but in this sentence it most naturally refers to an organized body such as:

• a company board
• an association’s governing board
• a committee in charge of administration

So it is not just rule or reign here; it means the group that runs something.

Because it is the direct object of предложило, so it is in the accusative case.

The basic dictionary forms are:

• новая = new
• кандидатура = candidacy / nominee / candidate proposal

Since кандидатура is a feminine noun, and it is a direct object, the accusative singular is:

• новую кандидатуру

So the sentence structure is:

• Правление = subject
• предложило = verb
• новую кандидатуру = direct object

Because feminine adjectives change form in the accusative singular when they modify a feminine noun.

Here is the pattern:

• nominative: новая кандидатура
• accusative: новую кандидатуру

This is a very common adjective change in Russian:

• старая книга → старую книгу
• интересная идея → интересную идею

So новую is simply the correct accusative form of новая.

This is a very useful distinction.

• кандидат = the candidate, the person
• кандидатура = the candidacy, nomination, or proposed candidate as an option

So предложить кандидата and предложить кандидатуру are close, but not exactly the same:

• предложить кандидата = to propose a candidate
• предложить кандидатуру = to put forward a candidacy / propose someone as a candidate

In many contexts, кандидатура sounds a bit more formal or institutional.

Предложило comes from предложить, which is the perfective verb.

Russian often uses the perfective aspect when talking about a completed single action:

• Правление предложило новую кандидатуру.
  The board proposed a new candidate / put forward a new candidacy.

The imperfective partner is предлагать:

• Правление предлагало новую кандидатуру.
  The board was proposing / used to propose / had proposed a new candidacy.

So in your sentence, the perfective aspect presents the proposal as a completed event.

Yes. Russian word order is flexible, although the neutral order here is very natural:

• Правление предложило новую кандидатуру.

Other orders are possible, for example:

• Новую кандидатуру предложило правление.
• Предложило правление новую кандидатуру.

These alternatives change the focus or emphasis, not the core meaning.

A rough idea:

• Правление предложило новую кандидатуру.
  neutral statement
• Новую кандидатуру предложило правление.
  emphasizes it was the board that proposed the new candidate
• Правление новую кандидатуру предложило.
  can emphasize the object or sound more contrastive depending on context

So Russian uses case endings, not only word order, to show grammatical roles.

Кандидатура is inanimate, and yes, that matters for case patterns.

In Russian, the accusative case behaves differently for some nouns depending on whether they are animate or inanimate. But here, since кандидатура is feminine singular, the accusative form is clearly:

• кандидатуру

Compare:

• кандидатура → кандидатуру
• книга → книгу
• идея → идею

So the form here follows the regular feminine accusative singular pattern.

The usual stress is:

• правле́ние
• предложи́ло
• но́вую
• кандидату́ру

So the whole sentence is pronounced roughly as:

• правле́ние предложи́ло но́вую кандидату́ру

Stress is important in Russian because it is not always predictable and can affect vowel reduction in pronunciation.

Yes, depending on context, новую can sometimes be understood as a new one or another one.

For example:

• if a previous candidate was rejected, новую кандидатуру may imply a different/new replacement candidate
• in a neutral setting, it may simply mean a new candidate/candidacy

So the exact nuance comes from context. Russian новый can mean both:

• newly introduced
• different from the previous one

Russian has no articles.

So Правление предложило новую кандидатуру does not explicitly mark:

• the board vs a board
• a new candidate vs the new candidate

English must choose, but Russian leaves that to context.

In many contexts, правление will be understood as the board, because it usually refers to a specific known body. Likewise, новую кандидатуру could be translated as:

• a new candidate
• a new candidacy
• the new candidate nomination

The surrounding context tells you which English version fits best.