| Name | Type | Description | Notes |
|---|---|---|---|
| begin_date | string | Begin date of the blanket period. It is the date upon which the Certificate becomes applicable to the good covered by the blanket Certificate (it may be prior to the date of signing this Certificate). Applies to NAFTA CO form only. Required for NAFTA CO. Format is yyyyMMdd. This is not valid for a paperless shipment. | |
| end_date | string | End Date of the blanket period. It is the date upon which the blanket period expires. Applies to NAFTA CO form only. Required for NAFTA CO. Format is yyyyMMdd. This is not valid for a paperless shipment. |