The Queensland Racing Integrity Commission expects to this week resolve part of an inquiry into possible breaches of the race day treatment rules at trainer Ben Currie's stables.

The inquiry is set to resume on Friday with three people associated with Currie's stable listed to appear and their cases are expected to be finalised.

Stewards opened an inquiry into the possible breaches after integrity officers spotted what they determined were suspicious activities at the Toowoomba stables on April 7.

QRIC Commissioner Ross Barnett said trainer Mark Currie and two Currie racing stablehands suspended following initial investigations have been called to appear at the resumed Inquiry.

"Mark Currie faces a number of charges and has previously entered a plea of not guilty," Barnett said.

"Stewards allege race day treatment of race horses occurred on two separate occasions on the morning of Saturday April 7 and Saturday March 24.

"The analysis of CCTV footage seized from the Toowoomba stables is now complete in respect to these three racing participants, however the investigation of other substances seized is ongoing and is expected to continue for some time."

Barnett said he expected Mark Currie and the two stablehands' matters to be determined at the Friday's hearing.

Ben Currie has not been listed to appear on Friday.