| Field code | ALTER_DATE1 |
| Field description | First alternative date for marrow collection / CBU shipment |
| Field type | Date Length: 8 |
| Field rule | Date format YYYYMMDD |
| Dictionary field | Preferred date (collection/shipment) 2 (Second preferred date for collection / CBU shipment per TC) |
| EMDIS messages |
WOR_REQ |
| WMDA XML fields related to dictionary field |