ACA Annual Meeting Registration Information

Everyone must submit a registration form (including session chairs, invited speakers, etc.) with the appropriate fee. Registered participants will receive confirmation of registration after completion of the form and payment.  Workshop registration fees are additional to the conference registration but will be included in your total at checkout.   


All individuals attending the conference must pay a registration fee. All workshops and educational session presenters must be registered!

   Standard conference registration includes: 

Keynote, Plenary Session & Closing Banquet

♦Entry to Keynote

♦Entry to all plenary sessions

♦Entry to Closing Banquet




Presentations & More

♦Access to all general and concurrent sessions

♦Access to all session abstracts and meeting pages

♦Access to all three poster sessions

♦Coffee Breaks during the general and concurrent sessions


 Expo & Networking

♦Entry to the Exhibit Show

♦YSIG Mixer Ticket (For Students & PostDocs Only

♦ Volunteer Opportunities 



Meeting Registration & ACA Membership

We offer different registration rates for this event based on your ACA member status. There are special rates and discounts for ACA Members, Student Members and Retired Members, Learn more about an ACA membership and how it can save you $200 off the non-member registration rate.


 2023 Registration Rates

(Before May 15, 2023)

(After May 15, 2023)
    Member   Non-Member     Member   Non-Member
Regular $595   $795   $795   $1,085
Retired  $325   $350   $390   $390
PostDoc*  $325   $440   $390   $540
Grad/UnderGrad* $275   $375   $385   $475
Local Student**  $100        $100    
Guest (16 and Over)  $150        $150    

*Includes YSIG Mixer Ticket

**One day registration at $100.00 is available to local ACA member students and Postdocs. Local means: a person enrolled at a college or university that is located within 150 miles of the city of Baltimore, Maryland.

Workshop FeesRegularRetiredPostDocGrad/UnderGrad

Workshop #1: Workshop In Single Particle Cryo-EM & Cryo-ET 

(Does NOT include lunch)

$50 $50 $50 $50

Workshop #2: SAMPREP (Sample Attributes for Multiple-techniques and Principal Requirements for Experiments in Pan-structural biology) Workshop

(Lunch Included)

$125 $125 $75 $50

Workshop #3: Structure refinement and disorder modelling with Olex2 and NoSpherA2

(Lunch Included)





Workshop #4: Best Practices of the Quantum-Mechanics (QM) driven Macromolecular Refinement

(Lunch Included)





Workshop #5: Simple and Advanced Single Crystal X-Ray Structure Refinement Using ShelXle

(Lunch Included)

$60 $60 $60 $60


Registration must be submitted on or before 11:00 PM., EST, May 15, 2023, to be eligible for the early registration rate. On or after May 15, 2023, registration will be accepted at the higher rate. Fees for workshops and social events are separate from the registration fee but will be included in final total at checkout. Purchase orders not accepted. A $35 fee applies to returned checks.  Registration fees must be paid in USD. 

The non-member meeting registration rate includes an ACA login for the remainder of the calendar year.  In order to access the meeting site attendees will need to have an ACA login.  After registering as a non-member you will receive information with direction on creating an ACA account.  

It is expected that each abstract submission will be accompanied by ONE paid registration.  To be eligible to present (either orally or during a poster session), at least one author of an accepted paper is required to register for the conference prior to the submission of the abstract.  


Children & Guests

We know that many of us are wearing multiple hats, employee, parent, teacher, conference goer. Please know the ACA understands and encourages partners, caregivers and parents to attend. Please know that ACA2023 is child-friendly.  Registered children under 16 will receive a badge and access to the meeting space.   


Meeting Registration Refund Policy

  • Cancellation requests should be made in writing to ACA Headquarters.
  • Requests received on or before May 15, 2023, will receive 100% of the total remittance.
  • Requests received between May 15, 2023 and June 15, 2023 will be honored minus 50% of the total remittance.
  • Fees will not be refunded after July 1, 2023. 
  • Purchase orders not accepted.
  • A $35 fee applies to returned checks.

Registration Confirmation

Registrants will receive a confirmation email at the address provided under in the registration information provided during purchase. Please ensure that your email address is correct when registering. If you register as a non-member you will receive an email with instructions on how to set up a profile and obtain an ACA login to submit an abstract.  


Special Needs

The ACA works hard to create an Annual Meeting that is accessible to all. Participants with special needs arising from a disability are asked to contact the ACA HQ to discuss appropriate accommodations.  We ask that all requests for reasonable accommodations at our live events be made as early as possible, and well in advance of the event, so that we may best meet individual needs. On-site requests will be met to the best of our ability; however, available resources may be limited.


Code of Conduct

By registering for the meeting, participant agrees to abide by the Code of Conduct Policy established by the Council, March 24, 2016.


Health & Safety Guidelines

The health and safety of ACA Annual Meeting participants, as well as the exhibitors and guests are the ACA's highest priorities. ACA is committed to providing opportunities to engage in the safest and most enjoyable in-person experience possible. The ACA will follow CDC recommendations and will refer to COVID-19 Community Levels when informing participants about decisions pertaining to health and safety precautions for the ACA Annual Meeting 2023.


Speaker Policy

The ACA Council is pleased to announce the adoption of the Speaker Policy.


Photo/Video Release

ACA will take photographs and video at the meeting. By registering for the meeting and its associated events, you agree to allow ACA to use your photo and/or video footage of you in our publications, materials, websites, or promotions.


Prohibition of Recording/Copying of Material

As part of registration, attendees will be required to agree not to capture, retain, or distribute any of the presentations or material associated with the ACA Annual Meeting.


Privacy Policy 

The American Crystallographic Association (ACA) respects the privacy of members and operates according to the Privacy Policy as outlined on the ACA homepage.