Does anyone know anything about treasure trove laws?

[istara]

For the purposes of a novel I need to know what the treasure trove laws were in Germany in the 1970s. I found the following by Googling (but it’s obviously too recent) so what I think I need to know is the what the 1932 Act states:

The 1992 law on the search for, and preservation of antiquities, covers all objects belonging to the ancient period, early Christianity and the Middle Ages.

Excavation requires a licence and work may not be carried out, without permission, near an antiquity in such a way as to affect it directly or indirectly. All accidental discoveries must be reported. Rewards are made equal to 50% of value if found on public land and 100% if on private land.

Although the 1932 Act does not refer to metal detectors, any items found by its use are covered by the Act.

Thanks in advance if someone out there can help.