Overseas subsistance (rates) will be reduced if in-flight is provided. Heavies just finding this out, but stil no clear guidance. No breakfast, lunch, dinner rate for overseas subsistance now so not sure how they can work out how much your subsistance will be abated. Rule coming from if you receive meals when also receiving subsistance then you get abated subsistance rate. HR having difficulty providing guidance as mentioned but Air Cmd looking to apply the rule. Anyone suffered or know more?