The following link will lead you to the Federal Register announcement regarding discontinuation of the WAC series, dated 6/23/2015: https://www.federalregister.gov/articles/2015/06/23/2015-15271/policy-for-discontinuance-of-world-aeronautical-chart-series
Questions or comments should be addressed to Eric Freed, FAA/Aeronautical Information Services, Enroute & Visual Charting Group, 301-427-5080, [email protected].