Dear SIS team,
1) It is our understanding that there is no ISPA signature due date, that is a carrier has to sign the ISPA before they migrate. However as per Key Dates page, "As had previously been communicated, we would like to maintain the 2-month period that we allow carriers to review and sign the IS Participation Agreement.". Please advise accordingly.
3) If a carrier does not sign Attachment B at the time of ISPA signing, but would like to amend it later, is there a time period required for the changes to take affect?
4) If a carrier does not sign Attachment G at the time of ISPA signing, but would like/need to sign it later, what is the a time period required before sending any data?