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Same time zone rule
All dates and times for a single request must be in one time zone.
All fields for a single request must be entered in the same time zone. The protocol's example: if the plan has systems in EST and CST, all data in a single line item must still use one time zone.
Sources: ODAG protocol, Universe Table 1 guidance, PDF p. 17; CDAG protocol, Universe Table 1 guidance, p. 16.