The CAT NMS Plan requires Industry Members to synchronize their Business Clocks at a minimum to within 50 milliseconds of the time maintained by the National Institute of Standards (NIST), with the exception of Business Clocks used solely for Manual Order Events or the time of allocation on Allocation Reports, which must be synchronized to within one second of the NIST clock.

The CAT NMS Plan requires Participants to synchronize their Business Clocks at a minimum to within 100 microseconds of the time maintained by the NIST, consistent with industry standards, with the exception of Business Clocks used solely for Manual Order Events, which must be synchronized to within one second of the NIST clock.