At both the Chilkoot Pass and the White Pass, members of the North West Mounted Police (NWMP) were assigned to collect custom duties on the supplies brought into Canada. These officers were also used to protect supplies. As noted above, when stampeders traveled by the Chilkoot Pass, they had to leave some of their provisions at each end of the pass during the journey, as they could not manage transporting them all at once. To protect the supplies, a large detachment of the North West Mounted Police was stationed there to ensure the proper wares went to the proper traveler. The police also ensured that the rule of 1 ton of goods per person was enforced.