Some research projects may be eligible for review through an expedited procedure. The IRB may use the expedited review procedure to review minor changes in previously approved research during the period for which approval is authorized (see the policy for Continuing Review). Studies which involve no more than minimal risk to the participants may also be eligible for an expedited review process. Minimal risk means "that the probability and magnitude of harm or discomfort anticipated in the research are not greater in and of themselves than those ordinarily encountered in daily life or during the performance of routine physical or psychological examinations or tests" (45 CFR 46.102 (i)). Expedited review will be conducted by the IRB chairperson or by one or more IRB members designated by the chairperson to conduct the review. The IRB member(s) conducting the expedited review may approve a research project; however, the reviewer(s) may not disapprove the research. Instead, the reviewer(s) will refer any research protocol which the reviewer(s) would have disapproved to the full committee for review.