Recommendation 3 (Electronic Voting) Netherlands 2006
http://aceproject.org/ero-en/regions/europe/NL/netherlands-elections-assessment-mission-report/at_download/file
Though the reasons are clear for the existing variable structure of regulation of the different methods of voting, it would appear to be useful to review and consolidate the legal provisions by amendments to primary legislation, whilst still allowing developing technologies to be regulated by secondary legislation.