Of course,
Duty is normally 1 hour before (minimum 30min) and 30 min after although the check-out time is not included when calculating duty limit, since it's "post flight".
Ok, so 1 hour between 0600-2200 LT gives you 6 pts (not pesetas

) and duty between 2200-0600LT gives you 8 pts.
Each landing gives you an extra 5 pts. (first two landings do not count for C/A)
Normal duty limit is 90 pts. If the commander and the rest of the crew all agree, another 18 points may be used (reson being slot/enroute dely etc.).
To rid yourself from these horrible points you can either use TJ point-schampo (little joke there) or you can rest them down by deducting 6 pts an hour between 06-22 and 8 pts between 22-06. I.e you get/lose more points during night.
More (complicated) rules apply for stand-by duty / rest onboard / ground transport and so on.
The problem with this system appears when doing a night flight, that you earn 8 pts an hour for, exceedes 0600hrs besauce then, according to the system, you are only 6 pts worth tierd.
As you might see we don't have many freight airlines up here.
I hope you get the picture...