Hello Marc,
Welcome to expat.com!
Kindly note that for more visibility on the forum, I have created a new discussion for you.
After a little digging on google, this is what I found in this document: Protection of Property Rights
Foreigners cannot purchase land, although they can purchase structures
I hope that other members will be able to share more information with you soon.
Cheers,
Yoginee
Expat.com team