How should these points be understood in the development plan?

what does @Escroda say: is certainty being neglected here?

I thought my attitude towards the development plan was expressed in #7. Let me summarize: disastrous!
That also explains the displeasure of the authority employee. Since the development plan was created by an external office, I assume that it was the caseworker responsible for processing building applications, who can make just as little sense of this wishy-washy and does not want to commit, because a colleague or supervisor might have a different opinion.

Dry stone walls may be up to 120 cm high as fencing

The height restriction only applies to fences, not to dry stone walls. If you take the formulations literally, they actually ban nothing. They only expressly allow something.
The justification also states:
a peripheral enclosure of the properties with conifer hedges is not permitted
But apparently this did not make it into the development plan as a stipulation.

How great the development plan is was already noticed by the municipality regarding carports and garages, and the first amendment was rushed through all procedural steps in no time (less than two months!).

The justification also states:
a marginal enclosure of the properties with coniferous hedges is not permitted
However, this apparently has not been established as a regulation in the development plan.
How great the development plan is was already noticed by the municipality regarding the carports and garages, and the first amendment was rushed through all procedural steps in no time (less than two months!).

Will you tell me which plan this is? (the full-text search brought up a frightening number of hits)

I think I now understand at least the important points for our outdoor facilities well enough that we can start thinking about what to do. Once a plan is ready, I will check again to see if everything is okay. I don't really think there would be much trouble if the regulations are not followed 100%, but I just don't want to risk maybe getting problems later on or even having to tear down something expensive. 11ant I would tell you which development plan it is, but I still can't send a pm.

11ant I would tell you which development plan it is, but I still can't send a private message

Strangely, it also doesn't work the other way around right now, apparently only between members with over 200 posts. However, you can also reach me with my member name and gmx (de) at the end "classically" by email.

Hello, I don't want to create a new topic just for this, so I'll continue writing here...

How can you tell who has changed their ground level? The background is that a neighbor has now kindly offered to contribute to the support. This surprised us a lot because we had assumed that we would kindly participate. We are sure that he has added fill and that we have kept the terrain at the boundary with him as it was.

Can you orient yourself by the boundary stone? They were set before construction began. Or how can you still determine what the original height was?

Best regards and many thanks in advance

I don’t want to create a new topic specifically

Why not? It doesn’t cost anything.

Can you orient yourself on the boundary stone there?

Yes, if you are sure that they are still standing where they were originally placed.

Or how can one still determine what the original height was

The development plan includes the contour lines. The original height can therefore be interpolated at any point in the construction area, IMHO with an accuracy of one decimeter – that should be sufficient.