These characteristics of the appeals procedure not only serve as criteria when assessing whether a provision may be applied analogously in individual cases; they also have general legal consequences in many respects. It follows from the characteristics set out by the Enlarged Board that the general principles of court procedure, such as the entitlement of parties to direct the course of the proceedings themselves ("principle of party disposition"), also apply to appeals (see
G 2/91, OJ 1992, 206;
G 8/91,
G 8/93, OJ 1994, 887;
G 9/92 and
G 4/93), that a review of the decision taken by the department of first instance can, in principle, only be based on the reasons already submitted before that department (
G 9/91,
G 10/91), and that the proceedings are determined by the petition initiating them (ne ultra petita) (see
G 9/92 and
G 4/93). The Enlarged Board has also made it clear that the decision-making powers of opposition divisions, and of the boards in opposition appeal proceedings, are circumscribed by the statement under
R. 55(c) EPC 1973 of the extent to which the European patent is opposed. They have no powers to decide and thus investigate anything extending beyond that statement (see
G 9/91). This defined the sphere of application of
Art. 114(1) EPC 1973, and clarified the distinction between the power to initiate and determine the object of proceedings, on the one hand, and the power to examine the facts then relevant, on the other. The individual procedural consequences and the Enlarged Board's decisions are discussed in greater detail below.