In 2002, HAVA transferred the responsibility of bi-annually administering a survey on the impact of the National Voter Registration Act (NVRA) to the U.S. Election Assistance Commission (EAC).  EAC is required to submit a report to Congress assessing the impact of NVRA on the administration of elections for Federal office during the preceding 2-year period. This report includes recommendations for improvements in Federal and state procedures, forms and other matters.

Before 2002, the Federal Election Commission (FEC) was responsible for assessing the impact of the NVRA. Past reports can be viewed here. 

• The Impact of the National Voter Registration Act on Federal Elections, 2005-2006
• The Impact of the National Voter Registration Act on Federal Elections, 2003-2004