Several threads here discussed this in detail. I read the wikipedia article. As a former corporate lawyer, I don't believe the complete story is available. Corporate law may have been different in NY and PA in those days. Something is just not right with the accounts. Rutherford basically wrested control. Russell left a last will and testament designating directors. I don't see how that would be valid. The corporate by laws would govern selection of directors. Each side hired corporate lawyers to give opinion letters as to the validity of the director appointments. No side ever sought a judicial determination.
Hire a lawyer and enough qualifiations will be found to justify what you want to do.
Some member posted in response to my questions that the Bible Students were small in number. It was not the WT we know. Bible Students were not centrally controlled. The antiRutherford faction may have decided not to waste resources going to court. Letting Rutherford leave and maintaining Russell era principles in their congregations may have been more prudent.
There are Bible Student groups to this day.
Opposing legal opinions never solve any issue. Judges and appellate courts decide. I helped write opinion letters for corporations. They offer "safe harbors" from certain forms of government action. They tend to involve complex matters involving statutroy or administrative law. When courts have yet to rule and litigation might take decades, opinion letters are useful.
The corporate structures of the WT are fascinating. Shareholders are interesting, too.