The time when the call for tender is issued. The issue time must have granularity of seconds, and include time zone information

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Time
Rules
Identifier/Error message Flag
PEPPOL-T004-R007
[PEPPOL-T004-R007] A Call For Tenders MUST have an issue time.
fatal
PEPPOL-T004-R008
[PEPPOL-T004-R008] IssueTime MUST include timezone information.
fatal
PEPPOL-T004-R009
[PEPPOL-T004-R009] IssueTime MUST have a granularity of seconds
fatal