Are retaining walls on slopes prohibited according to the development plan?

Hello dear community,

in the hometown of my wife and me, a new residential area will soon be announced. Unfortunately, it is located on a hillside. We have now looked at the elevation according to the plans, and for the garden behind the house, this would result in a slope towards the house of 7-10% (depending on the plot, 0.9 - 1.2m height over 13m length). That would definitely be too much for us and would of course have to be adjusted. However, we have found the following note in the development plan:

B.6 Fences bordering public traffic and green areas, elevation
B.6.1 Fences bordering public traffic and green areas must be made of wood or metal.
B.6.2 The fence height may not exceed 1.20 m.
B.6.3 Opaque fillings or coverings of the fence panels are not permitted.
B.6.4 Metal fences must be planted with deciduous shrubs or allowed to be covered with climbing plants.
B.6.5 The elevation of the new buildings and paved areas must be based on the surface level of the immediately adjacent public traffic area.
B.6.6 Retaining walls for compensating elevation differences are permitted at a distance of 2m from property boundaries within the building window area up to a maximum height of 1.00 m.
B.6.7 Other elevation differences should be compensated as much as possible, based on the original terrain, by slopes in the paved and vegetated areas as well as vegetated embankments with inclinations of less than 1:2.

I understand this to mean that I am not allowed to level the garden at the property boundaries with retaining walls or similar, and that I must work with a slope ratio of 1:2 (and that on three sides of the plot)?

Am I misunderstanding this, or are these actually the specifications? This seems very unfortunate to me.

Thank you.

are those really the specifications?

These are the specifications you gave us. It is already quite difficult to discern the intentions of the urban planners from the complete textual and graphical provisions of a development plan; partial quotes carry even greater risks of misinterpretation.
Since all quoted points fall under the heading "Einfriedungen zu öffentlichen Verkehrs- und Grünflächen," it is conceivable that all subpoints refer only to the boundaries to public areas. But without knowledge of the complete statute, this is guesswork.

Thank you for your support. I have also already thought that it might only concern the boundaries to public areas. I guess the complete statute would go beyond the scope here, but otherwise I can't find any further information on it. I think I will have to appear before the municipality next year, I hope they can really help me accordingly. Happy New Year.

One does not know the property here either. 10% is quite a lot, but what about the building envelope, in which direction could the terrace face? ... because you can place the entrance to the basement, etc... So: you really have to move away from the standard mush and explore options. Many sloped lots only become buildable this way, often with a high added value. However, it also costs more.

I have also thought that it might only concern the boundaries to public areas.

And why did you discard that idea again?

And why did you reject it again?

Unfortunately, it’s because every time I read the statutes and try to interpret them for myself, I interpret something different...