An informal opinion is not a formal decision and is drawn up at the request of the parties and on the basis of the information provided by these parties.

ACM (or other competent authorities such as the European Commission) may deviate from
an informal opinion rendered but are bound by general administrative law duties to
motivate their decisions. Civil courts are not bound by informal opinions issued by
ACM but case law shows that they will generally attach importance to such
opinions issued by the regulator.