If demand for access to certain beamlines is less than the total beam time available, the excess time may be allocated as µSR Users' Time. This time will be allocated to experimenters that request it by TRIUMF's Director and the head of the TRIUMF Science Division. This extra beam time gives users the chance to respond rapidly to recent discoveries; to recoup beam lost earlier in the schedule; to make some progress in an experiment when other beam time was not allocated; and to try out new experimental techniques before making a major EEC proposal.