ACP 61400-6, the modified adoption of IEC 61400-6, has been approved by ANSI as a US standard. The newly approved standard can be purchased from the ANSI webstore. Our Principal Engineer, Jomaa Ben Hassine, has contributed to both the original IEC 61400-6 and the modified ACP 61400-6. Check out this link for more information on our contributions to codes and standards affecting civil engineering practice.