I find it interesting that posters have taken my super-majority comment about whether it’s needed to join the union. I was meaning it at the earlier stage: is it fair for Puerto Ricans to be told that the margin for a huge change to their current situation is 50%+1 ? Maybe a super-majority should be required for Puerto Rico to decide which way it wants to go? If that choice were ultimately for statehood, a super-majority wouldn’t be needed for that final stage.
Major changes to a constitutional position, one that is likely irreversible, often need a super/majority. See: adoption of the US Constitution. I think it’s too simplistic to adopt a 50% + 1 standard.
Or, instead of a super-majority, when you have three options (status quo; independence; statehood), you can do the votes in stages, with two referenda, to clarify the options.
For example, in 1948, Newfoundland, at that time a separate but bankrupt British Dominion, was considering its future after WWII. There were three options, very similar to the situation Puerto Rico is in now: full independence; remain under British governance; or join Canada.
Newfoundland sent delegations to the UK and to Canada. The results from the UK were not promising, as the UK was financially strapped from WWII and was not prepared to provide subsidies to Newfoundland. The Canadian made an offer of more generous financial terms.
Those three options were put to the people of Newfoundland in a referendum in June 1948. None gained a majority, but remain under British governance came in third, with only 14%. Independence came in first, at 44%, and Confederation with Canada second, at 41%.
So the option of remain with Britain was dropped from the ballot and a second, binding, referendum was held a month later, with just independence or Confederation on the ballot.
On that one, Confederation came first, with 52%, beating independence, which came in at 48%.
Canada and Newfoundland then worked out the terms in detail, and Newfoundland joined Confederation.
That final vote wasn’t a super-majority, but the process followed ensured that the people got a chance to vote on all three options and make the final decision.
I could see a similar process being used for Puerto Rico, but letting the people themselves decide if they want status quo.