The taxi rates for the Cozumel taxi union changed effective September 1, 2016. Now, each taxi driver has a laminated rate card that he must carry and show to anyone asking the fare. It lists rides by zone, as well as some point-to-point fares, special trips, hourly rates, waiting time, etc..
The exchange rate established by the union is currently 18-1.
The 4 rate cards are shown below.