Section 2.12 - Periodic Tests(1) The periodic test sequence shall consist of five consecutive control standard analysis tests. The results of the alcohol concentration of each of these tests must be in the range specified in 501 CMR 2.11(2). The periodic test results shall be truncated to three decimal places. This report shall serve as the record of a valid periodic test that the device is working properly, and shall be admissible in a court of law.(2) At a minimum, the OIC(s) shall initiate the periodic test sequence whenever the control standard is replaced and after the breath test device is certified by OAT.Amended by Mass Register Issue 1309, eff. 3/25/2016.