What I got is that as this technology is quite new, legal implications are quite vague. 3D printing increase risk opportunities and therefore premiums. It is important that insurance companies become familiar with 3D printing technologies and applications to better protect their clients. Swiss Re looks to be really active with this. An interesting article about this was released at http://www.didiy.eu/blogs/swiss-re-insurance-company-developing-claims-program-3d-printing.