I think it depends on the country you are transporting into. I know here in NZ we have to fill in the right paper work and have them transported into an appropriate registered facility. There are different rules and procedures for GM lines, stem cell lines and infectious materials. I don't think there are any international guidelines, you just have to work within the rules of the exporting and importing countries.
Thank you for taking the time to reply my question. You are right. The present regulations are somehow country dependent. As cellular and molecular biology has developed and gained much popularity all over the world, I have thought there is a general guideline for international transportation of cell lines. Since I am interested in ethical issues in stem cell research and also regulations and concerns related to this area, I try to find these kind of codes and rules. I think it's a matter for researchers. Thank you again Daniel. I have benefit from your response.
I know New Zealand and Australia share some safety standards and that the standards for transitional facilities (places we can import such materials into) are referenced to some international documents such as Cartagena protocol ( http://bch.cbd.int/protocol ), the international standards for Phytosanitary Measures ( http://www.fao.org/docrep/009/a0450e/a0450e00.htm ) and the International Air Transport Association (IATA) Dangerous goods regulations ( http://www.iata.org/whatwedo/cargo/dgr/Pages/index.aspx ). The last one is probably the closest to what you seem to be looking for as it's the only international standard recognised by airlines. Unfortunately it's a pay-for-view document.