ICWL attendees have the option to register at Full/Author, Doctoral Consortium or Student rates. Registration also allows you to attend all SETE sessions.
Each paper needs at least one author to be registered at the Author rate. Registering as an Author only entitles you to present one paper so if you are presenting multiple papers you need multiple registrations. For example, if you had two papers accepted and are planning to present both then you need to register twice.