If you are SL, and you only have 25,500 miles accumulated. That's 4,500 miles off the target 30,000 miles; however, that's 15% off 30,000 and therefore CX MAY still qualify you for SL at their discretion.

51,000 for GO, 102,000 for DM, you get the idea.

Again the emphasis is that this is strictly CX goodwill and not a guarantee nor a right.