List of cases subject to system design choices made by the infrastructure manager according to the specification referenced in Appendix A-1, index [C]. In https://www.era.europa.eu/sites/default/files/filesystem/ertms/ccs_tsi_annex_a_-_mandatory_specifications/set_of_specifications_3_etcs_b3_r2_gsm-r_b1/index004_-_subset-026_v360.zip Subset 26, Chapter 5 5.4 Procedure start of mission.