A bill introduced into the House to reauthorize FEMA includes a provision that would require national EAS tests "at least once" every three years.
The bill, (H.R. 3300) reauthorizes FEMA through Fiscal Year 2016 at $972 million each year, consistent with current funding levels. Some $12 million of the total would provide Congressional authorization for FEMA's Integrated Public Alert and Warning System, which uses several technologies to simultaneously send alerts through many different channels. EAS, along with wireless alerts, Internet services and NOAA, is part of IPAWS.
h/t Jeff Patterson