Have you considered calling SAS and ask? Probably the fastest and most reliable way to find out.

This is from expertflyer, for fare basis VHUSSCE (only V fare currently in the system):

UPON PAYMENT OF USD 300.00 CHANGE FEE FULL VALUE MAY BE APPLIED TOWARD PURCHASE OF NEW TICKET PRICED AT HIGHER CURRENT FARES LEVELS

May or may not be relevant to you...