GRP Rainer Lawyers and Tax Advisors, Cologne, Berlin, Bonn, Düsseldorf, Essen, Frankfurt, Hamburg, Hanover, Munich, Stuttgart, Bremen, Nuremberg, London www.grprainer.com/en explain: It is generally recognised that contractual freedom also applies to shareholders. Occasionally, provisions in memoranda of association can be fully permissible, which would not, for example, be the case in the articles of association of a stock corporation (AG).