1. The Basic - Rule

1. Nature distributes the total energy to be stored in the particles always in that way, that the number of occupied energy levels is as large as possible and at the same time their energy heights are as low as possible. A distribution not according to this rule is not impossible, but very improbable.

2. The Force - Rule

If the particles are bound by strong forces to stay in a small volume (small uncertainty of position), the distances between the shelves increase. Enlarged quantum leaps will occur.

3. The Mass - Rule

If the considered particles own a large amount of gravity, we find adjoining shelves at slight distances. Small quantum leaps will occur.