On the SEPS/ČEPS profile transmission capacity rights are not allocated through explicit yearly and/or monthly auctions. There is possibility to nominate crossborder transmissions freely untill D-2 - see document:
Day-ahead cross-border capacity rights are allocated through implicit allocation within the frame of trilateral CZ-SK-HU Market coupling procedure. OKTE, a.s., is the Short Term Day-Ahead Market Operator in the Slovak Republic Organization of Short Term Daily Market is governed by the Operational Order of OKTE, a. s.
Intraday cross-border capacity rights are allocated using the first comes - first served principle. Transmission capacity allocator function is fulfilled by ČEPS.
For detailed information see Services/Cross-border profiles/Intraday