...
Columbia has Business Associate Agreement (BAA) with AWS, so if you are a faculty member or administrator who uses AWS for Columbia purposes, your AWS account is required to go through the CUIT. Student and personal AWS accounts are not covered under the enterprise agreement.
You will need a chartstring Chartstring to request an account and there is a good deal of documentation to read on that page, including what is and is not permitted to use a Columbia AWS account to do.
Columbia AWS resources
...