CAP371 (and your Ops Gen?) states that the limits set for max FDP and early starts is based on the Flight Deck report time. Therefore is you reported prior to 0600 local but the pilots reported after 0600local then your FDP is based on their report time but starts when you report. This change only applies to allowable FDP and early starts, it doesn't apply to start times after days off. Likewise, if you report before 0700 local but the pilots report after 0700 local then it does not count as an early start.