In Norwegian “non-<title>” is not something Norwegians commonly use to describe someone who doesn't inhabit a special role. To comply with the Style Guide it is changed from a description (non-admins) to a statement (not admins).

It is also common to translate the shortened “admin” to “administrator”, altho “admin” is sometimes used. However, the plural form “admins” is almost never used and is therefore translated to the plural “administratorer”

“Irrevocably” is translated to “permanently” because the Norwegian equivalent (ugjenkallelig) is rarely used at all. “Permanently” is often used, especially in this context.

“...members of the group…” is omitted because it’s redundant and sounds very unnatural in Norwegian. It is heavily implied that the change will happen to members belonging to the group and doesn’t need to be specified.