# TlsBulkCertificateResponseAttributes
## Properties
**created_at** | Option<**String**> | Date and time in ISO 8601 format. | [readonly]
**deleted_at** | Option<**String**> | Date and time in ISO 8601 format. | [readonly]
**updated_at** | Option<**String**> | Date and time in ISO 8601 format. | [readonly]
**not_after** | Option<**String**> | Time-stamp (GMT) when the certificate will expire. Must be in the future to be used to terminate TLS traffic. | [readonly]
**not_before** | Option<**String**> | Time-stamp (GMT) when the certificate will become valid. Must be in the past to be used to terminate TLS traffic. | [readonly]
**replace** | Option<**bool**> | A recommendation from Fastly indicating the key associated with this certificate is in need of rotation. | [readonly]
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