RYAN Crowley's AFL Anti-Doping Tribunal hearing has been rescheduled for May 18 after the Australian Sports Anti-Doping Authority requested more time to prepare.

The Dockers veteran is serving a provisional suspension for a positive drugs test last year, and his Tribunal hearing was scheduled for this coming Friday in Melbourne.

But the 31-year-old will now have to wait another 17 days after Tribunal chairman David Jones advised via an AFL statement on Tuesday that the hearing had been rescheduled.

Jones said that ASADA requested more time to prepare for the hearing to respond to submissions made by Crowley's legal team.

According to the original schedule ASADA made its written submissions to the Tribunal on April 2.

Crowley's legal team was due to present written submissions on April 17 before the scheduled hearing on May 1.