The scheme in the UK is laid down on CAA publication CAP371. I think that you can obtain a copy online from the CAA website. Try
http://www.caa.co.uk/publications/pu...ails.asp?id=22
CAP 371 is part of each operators operations manual (Part A) and is then approved for the operator by the CAA. For a given operator it may contain variations for particular type of operations such as when an airline is concerned mainly with night freight.
In short the document is the same for charter, schduled and freight with minor variations which will be in the companys ops manual.
In Short Max Flt Hours 900 p/a
100 Hours in 28 days.
Max flight duty on a given duty depends on the time of report, the number of sectors to be flown and whether or not the crew are acclimatised in the time zone in which they report for duty.
Hope that helps
SAM