Thank you EXDAC!
In comparison an extract of the essential from above referernced spanish Circular Operativa 16B.
The CO-16B limits Flight DUTY rather than Flying TIME over a day.
Flight duty start at the start of any scheduled duty or 45 min before first scheduled flight whichever is earlier and ends brakes-on after the last flight.
Flight Duty so defined is maxed at 8 hrs a day, extendable to 10 hrs a day with the extension meant as an allowance to get home from a navigation flight only.
And then maximums for flight training hours including other commercial flying hours per 28 days, per 3 months etc., similar to european commercial air transport.
Exacty wording and numbers etc in the CO-16B itself.
Anyone else any more? From Europe?