Section 16-11-125 - Test standards(a) Each electric company, upon notification, shall submit to the commission's standards laboratory for checking for accuracy, one of its master rotating standards at least once in each year.(b) Master watthour meter standards shall not be used to check or calibrate working standards unless the master standard has been checked, and adjusted if necessary, within the preceding twelve months. Each master standard watthour meter shall have a calibration record available and a history card.(c) Portable indicating instruments shall be checked, in a laboratory approved by the commission, and adjusted if necessary, at least once a year. A historical record shall be kept of such checks and adjustments.(d) All working rotating standards when regularly used shall be compared with a master standard at frequent intervals. Standards infrequently used shall be compared with a master standard before they are used.(e) Working rotating standards shall be adjusted, when necessary, and a record shall be kept for each instrument.Conn. Agencies Regs. § 16-11-125