Recommendation 22 (Electronic Voting) United States of America 2006
http://aceproject.org/ero-en/regions/americas/US/united-states-of-america-assessment-mission-report-1/at_download/file
As the responsibility for administering an election is vested with the states’ and counties’ authorities, this should be accounted for in the commercial relationship with vendors. Arrangements should be facilitated by a more clearly defined division of responsibilities, including access to software codes for public testing by professionally competent entities or individuals, under appropriate confidentiality conditions providing both for transparency and adequate protection against possible misuse of the codes.