blueb0y79,
If you look through the FTL there is what's known as Table A and Table B which dictate how many hours a crew can do depending on their 'local' time of start.
Table 'A' is most commonly used and assumes the crew are acclimatised to the local time of the country they are starting their duty in, i.e. they must be on chocks after 11 hours. This does not include any time allocated for post flight paperwork which comes into play in the total duty and minimum rest calculation.
For example, in the UK reporting at 0800 local (0700z) and doing 5 sectors means the crew can do up to 11 hours duty before they go into discretion.
There are many variations and quirks in the scheme itself and these take time to learn and get used to. Once you do it's a very good scheme (just a personal opinion) that is designed to protect crew from fatigue, whilst maintaining a degree of flexibility so crucial in this industry.
Hope this helps......
BTS