Teams should be following the current regulation (Reg. 10) regarding concussions. Essentially – any player with a suspected concussion should be removed from play immediately. The full guidelines can be accessed via the attached link, or the attached document.
LINK – iRB Concussion Guidelines
DOCUMENT – IRB_Concussion_Guidelines_EN
Also, please note that Pitch Side Concussion Assessment (PSCA) Trials Not Approved at this time. For more details, go here.