SEEWQCI has received Letters of Support (LoS) from SBIQCI, CEQCI, TransEuroOGS, BENELUX-QCI, IberianQCI, BAT-QCI, QRUSOE, ROGS, QCI-AT-CZ-PL, and QCI-SK-CZ-PL.

Among the submitted proposals, the following have been approved:

• BAT-QCI – Member States: DE, AT
• BENELUX-QCI – Member States: NL, BE, LU
• CEQCI – Member States: AT, HU, RO, SK
• IberianQCI – Member States: PT, ES
• QCI-AT-CZ-PL – Member States: AT, NL, PL, CZ
• QCI-SK-CZ-PL – Member States: PL, CZ, NL, SK
• QRUSOE – Member States: RO, FR
• SBIQCI – Member States: RO, BG
• TransEuroOGS – Member States: DE, LU, EL, IE
• ROGS – Member States: RO