The companies do have a transitional period of two years in order to be fully compliant with the new law. This means as from 1.1.2015 the new accounting standards will apply to all kind of companies. The new legislation treats all kind of companies in the same manner, disregarding if it is an AG or GmbH or other form of company. For the new consolidation and group accounting rules, the new provisions have to be implemented latest 1.1.2016.
The following article gives you a summary and review about the new financial reporting legislation.
(only available in German or French)
"Neues Rechnungslegungsgesetz – eine Würdigung"
"Le nouveau droit de la révision"