John, I read your two descriptions, and neither fits all of the training I've taken, whether it was GUE or another agency.
GUE does not require you to take the class over again if you can't meet the standard; many folks get a provisional pass, and are sent off to work on certain specific deficiencies until they can be reevaluated and passed. You take the class over only if you FAIL, which requires a certain degree of effort in most cases
Or if you are unable to convert your provisional within the six month allowed period, which is what happened to me with C2, because I was unable to meet the criteria for passing due to the logistics involved.
GUE's standards for passing (and the standards for the numerical assignment for each required skill) are published, and I believe part of the reason for that is to try to reduce the inter-instructor variability in what is viewed as a passing performance. The standards ARE high, and honestly, I like that, even though I struggle with them. Having now done a fair bit of cave diving and a little technical diving, I think the standards across the board ought to be higher than they are (not in GUE, but elsewhere). That said, I don't think very many GUE instructors expect you to be as good at the end of a class as you will be a few months later -- but some do. That's why I did say that, even in GUE, one needs to pick one's instructor carefully.
GUE does not require you to take the class over again if you can't meet the standard; many folks get a provisional pass, and are sent off to work on certain specific deficiencies until they can be reevaluated and passed. You take the class over only if you FAIL, which requires a certain degree of effort in most cases

GUE's standards for passing (and the standards for the numerical assignment for each required skill) are published, and I believe part of the reason for that is to try to reduce the inter-instructor variability in what is viewed as a passing performance. The standards ARE high, and honestly, I like that, even though I struggle with them. Having now done a fair bit of cave diving and a little technical diving, I think the standards across the board ought to be higher than they are (not in GUE, but elsewhere). That said, I don't think very many GUE instructors expect you to be as good at the end of a class as you will be a few months later -- but some do. That's why I did say that, even in GUE, one needs to pick one's instructor carefully.