Punctuating and constructing a confusing list

Question

I need to write a list that I cannot find a great parallel construction for because certain items in the list use "of" and one uses "to".

The sentence as originally written:

Ratification, acceptance and approval of a treaty or accession to it shall be conducted when it is required by the treaty.

I've been contemplating the following re-write:

Ratification of, acceptance of, approval of, or accession to a treaty shall be conducted when required by the treaty.

Or:

A treaty shall be ratified, accepted, approved, or acceded to by the State when the treaty so requires.

Any other ideas on how to construct this sentence in a readable and grammatically correct way?

EDIT: I noticed the question on passive voice recently posted as well. The third example would be a case where passive voice is arguably preferable as the emphasis of this sentence should be the treaty and not the State.

Answer 1

It would be helpful to have a little more of the rest of the sentence (at least the subject of it), but:

The [subject-of-the-sentence] shall only ratify, accept or approve a treaty, or accede to a treaty, ...

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In light of the edit to the question:

The State shall ratify, accept or approve a treaty, or accede to it, when necessary.

Both of these are using the active voice - the subject of the sentence (the State) actively doing something.