I'd say Syrixia's answer seems rather accurate.
Structure from what I can see:
Political HQ/Council/Etc is located in Minas Ersul, Eumenor (Leadership and department heads and filing location?)
Secondary HQ in Balamb, Syrixia (Is this maybe the administrative/operational office and secondary filing location?)
>>Proposal below<<
We have a pending proposal for a naval joint operations force. I'm going to propose something a little different here:
Ceretis, through SHAEF, will offer one of the existing SHAEF multi-national joint force bases specifically for use by the Helmebaine Alliance.
SHAEF (Supreme Headquarters Allied Expeditionary Force) of The Prism (KRC, Department of Defense), under Field Marshal Serenity Imahara currently oversees multinational operations for Ceretis and its regional and trans regional allies.
The SHAEF base if accepted by the Helmebaine Alliance can be used for operational staging, joint training, resupply, communications, intelligence, electronic warfare, repair, medical, support, joint field research/testing, temporary prisoner housing, and special operations.
The base hosts facilities for coordinated air, sea, and land forces as well as communications capacity for space assets if made available. The base is designed with layered defenses, EM hardened operations bunkers, and observation obscuring systems.
I believe the alliance should set forward a clearer understanding of the following:
Prisoner of war processing and housing and location (Required for any military unless they have a standing execution policy)
Primary military joint research facility and location (I recommend utilizing the SHAEF base as the field test and alternate/secure research facility)
There may be need for a secondary SHAEF/alliance base hosted elsewhere depending on alliance military size and air support needs
Other concerns:
Combat observers, In force peacekeeping, and humanitarian aid