As a Chelsea supporter I really am neutral on the whole issue but unlike other matters with UEFAs jurisdictions participating in UEFAs competitions is dependant on getting a license. Each club has to make an application and jump through all sorts of hoops.
I am far far from an expert but here’s one of the conditions that you are required to accept.
LEGAL CRITERIA
Declaration in respect of participation in UEFA club competitions
1 The licence applicant must submit a legally valid declaration confirming the following:
a) It recognises as legally binding the statutes, regulations, directives and decisions of FIFA, UEFA, the UEFA member association and, if any, the national league as well as the jurisdiction of the Court of Arbitration for Sport (CAS) in Lausanne as provided in the relevant articles of the UEFA Statutes;
b) At national level it will play in competitions recognised and endorsed by the UEFA member association (e.g. national championship, national cup);
c) At international level it will participate in competitions recognised by UEFA or FIFA (to avoid any doubt, this provision does not relate to friendly matches);
d) It will promptly inform the licensor about any significant change, event or condition of major economic importance;
e) Itwillabidebyandobservetheclublicensingregulationsofthelicensor;
f) It will abide by and observe the UEFA Club Licensing and Financial Fair Play
Regulations;
g) ItsreportingperimeterisdefinedinaccordancewithArticle46bis;
h) It will be accountable for any consequences of an entity included in the
reporting perimeter not abiding by and observing items e) and f) above;
i) All submitted documents are complete and correct;
j) It authorises the competent national club licensing administration and national
club licensing bodies, the UEFA administration and the UEFA Organs for the Administration of Justice to examine any relevant document and seek information from any relevant public authority or private body in accordance with national law;
k) It acknowledges that UEFA reserves the right to execute compliance audits at national level in accordance with Article 71.
2 The declaration must be executed by an authorised signatory of the licence applicant no more than three months prior to the deadline for its submission