ACM has introduced new templates for papers and articles to appear in their conference proceedings and journals. The new templates must be used for any new works that are currently still to be submitted, so that includes papers for GECCO 2017. We recommend all authors to use the new template (see the Call for Papers on this site). To ease the transition, for the review process we will still accept papers formatted with the ACM template that was used for GECCO in previous years. However, the final submission of accepted papers MUST be formatted using the new ACM templates.