My take on it is that the policy very. I know here I got one invite and I had to get a Saint to sponsor me. Always check with your local cannery and see what their policy is. I will say if it wasn’t for the assistance of some out of state Mormon friends I doubt if I would have managed the one invite.
Just did a bit of google search, the articles and info about closing non-members to the canneries got publicity in March, at that time I looked into the options in New Jersey and there aren’t any good options here in NJ.