Terrace - Building Boundary

Hello,
I receive different information from various architects, building supervisors (different locations) about whether a terrace is allowed to protrude beyond the building line (so not the distance areas to the property boundary).
Can someone help me with this, maybe even name legal regulations? (We are in Rhineland-Palatinate)

It is similar with whether the terrace should be included in the floor area ratio calculation or not?

Thank you very much

Our terrace extends beyond the building envelope and was approved without any problems as such. I do not know the legal regulations regarding this. However, the terrace is not included in the floor area ratio calculation.

Well, according to the Baunutzungsverordnung (1990), it does belong in the floor area ratio. But I have already noticed that this is handled differently at times.