For every material there is a responsible person who is informed about material state changes and asked to resend material's file if it is needed. The responsible person will be that participant who has registered the material.
See diagram of possible states:
After the registration ICCC organization staff checks the file of the material for existance, readablity, proper fonts and formatting, etc. This check can have two results. Submitted state means that the uploaded file is OK and ready for the review. Need_resend state means that something is wrong with the file and it must be corrected and uploaded again.
If a material becomes submitted then organization staff needs to ask a reviewer to review the material. When this step is done, the material gets reviewer_asked state. If asked reviewer refuses then this step needs to be repeated until a reviewer accepts material for review. When this happens the material becomes to review state.
After the review the reviewer makes a decision which changes material's state to one of the following ones: