The rush is on in Europe, at least for the best-prepared of LSA producers. EASA, the European Aviation Safety Agency, has accepted ASTM standards as a means of certifying light aircraft in the European Union, but put its own stamp on this approval. Those wishing to sell an ASTM-compliant SLSA in Europe have some extra hoops to jump through. The letters DOA, POA, and RTC apply, being, in order, Design Organization Approval, Production Organization Approval, and Restricted Type Certificate.
If you think that sounds a little like Part 23 requirements (read: expensive), you’re right. Yet if a LSA producer wants to sell essentially the same airplane in the USA and the EU, it has to get all the approvals. Recently, a third company achieved this, following Czech Sport Aircraft and Flight Design.