Mercury,
If you walk towards Sands and look at the bins you will see that somewhere around the Surf Cafe they change to Ciftlik Council ones. Many people think Koca Calis starts around Guven's place but they are under Fethiye Council not Ciftlik. As far as I am aware Koca Calis is part of Ciftlik not Calis beach/Fethiye.
I could be totally wrong though as I don't live there - it's just the impression I've got over the last 8 years.