[en] This document presents the fall-back procedures planned for cases where the trilateral power market coupling cannot be run correctly or cannot produce correct results. The reasons for fall-back can occur in three situations: market coupling is subject to normal business risks but risks have been minimized, winter clock change handled differently in the different local systems, and excessive proportion of block orders leading to bids infeasibilities. The possible fall-back situations are listed and the main principles for fall-back are explained: critical deadline for results publication/participants information, explicit auctions, south border, north border. (J.S.)