If the commission shall solve troubles like FIGG-AGI - fine. But where are the commission's limits? Lots of words in the constitution do not make that particularly clear. I have tried to find out but not got answers yet. In particular, it is not easily obvious when the Rules Commission decides and when the Appeals Commission decides. My guess is as below.
If I understand the constitution correctly, then "unless such appeal is expressly excluded in these bylaws or in the regulations of the EGF" applies to the General Tournament Rules,
http://www.eurogofed.org/egf/tourrules.htmwhich are regulations of the EGF, §7.5, which specifies that the Rules Commission makes the "final judgement" on disputes after an appeal against a tournament's appeals committee was made. This interpretation is also supported by "if the EGF or the EGF's disciplinary instances are not directly involved in such a dispute".
So far the Rules Commission may also make tournament / rules judgements as replacement final court of a national association's dispute, if the NA so wishes. This is specified in Functions of the EGF Rules Commission
http://www.eurogofed.org/egf/rulescom.htmin "Provide a means whereby countries can obtain advice on settling internal disputes related to Go rules or tournaments." So in that case, the Rules Commission would still be called and the Appeals Commission would be excluded.
For all(?) other purposes, the Appeals Commission might judge.
BTW, "in Europe" in Constitution §10 is now bad wording since the EGF expands beyond Europe. "in EGF member countries" would be better.
Unfortunately, "Appeals Commission" is too easily confused with "appeals committee [of a tournament]".