Units may schedule NSmen who have deferred their In-Camp Training (ICT) for Make-Up Training (MUT). NSmen will be notified of the MUT call-up via SMS/email, similar to other call-ups. Upon receipt of the call-up notification, NSmen are required to acknowledge the call-up through OneNS or call 6446-7636. If the call-up is not acknowledged within 10 days of the call-up notification, a hard copy of the call-up notice will be sent to NSman's official mailing address via registered mail. In general, the type of MUT (low-key or high-key) will depend on the type of ICT that has been deferred. NSmen will be notified of the MUT at least one month before the MUT.