Looking for clarification on the rule for modifying an international award ticket and using the DL schedule change rule to get change fees/mileage requirement differences waived when I want to modify the routing.

DL.com states one hour is needed here:
https://www.delta.com/components/pop...itions_txt.jsp

Blogger Delta Points states it's a cumulative total of 60 minutes or more. So....if one flight is changed 30 minutes and another is changed 35 minutes then the sum is over the one hour requirement and a change can be made without penalty.
http://boardingarea.com/deltapoints/...lta-air-lines/

I'm up to call #3 to the DL DM line and International Re-issue desk.

Calls #1 and #2 resulted in a phone rep saying it was 90 minutes. Call #3 transferred to the intl reissue desk but the agent was adamant that the change required ONE flight of 60 minutes or more; not cumulative.

Looking for some clarification by you award ticket schedule change vets out there.

Thanks in advance.