What punctuation do should I use for this sentence?

Question

Before the analysis on whether secret and half- secret trusts should be kept in modern equity the nature of these must be analysed. 

Do I use a comma or (semi) colon to separate 'equity' and 'the'?

Answer 1

It takes a comma after "equity."

Answer 2

A comma so that the reader (or speaker) knows when to take a breath.

Answer 3

A comma is sufficient because the entire sentence is talking about analysing the trusts.  Only use a semi-colon where the second clause is much more independent, and of equal to the first phrase.

This would be a better way to word it.

Before making a decision on whether secret and half-secret trusts should be kept in modern equity, the nature of these must be analysed. 

Answer 4

Use a comma.  You use a semicolon if both parts of your sentence (before and after the punctuation) would be complete sentences on their own, but the first part here is not a complete sentence.