No. Only one of the co-authors needs to submit a proposal. That person would create a “Submitter Only” account for themselves and submit on behalf of the group. While not required at the time of proposal submission, both (1) CIES membership for the 2023 calendar year and (2) Annual Meeting Registration for CIES 2023 are required for participation in the Annual Meeting Program. If your proposal is accepted, you will receive further instructions about becoming a CIES member or renewing your membership for 2023, as well as registering for the CIES 2023 Annual Meeting. All accepted presenters will be required to fulfill both CIES membership and CIES 2023 Annual Meeting Registration requirements by January 3, 2023, in order to appear in the conference program.