Volume 1 contains the commentary of regulations pertaining to the fundamental principles of non-contentious proceedings. In addition to a detailed introduction, this volume contains an explanation of the general part, particularly of the initial stage of official investigation, right of appeal and appellate procedure, coercive payment and direct compulsion, as well as of the costs under consideration of the current attempts at reform. With the publication of volume 1, the 3rd edition is now available as a completely revised and full edition.