83 Ill. Adm. Code 600.330
Installation of Meters
Section 600
Section 600.330 Installation
of Meters
No meter shall be placed in
service unless it has been tested previous to its installation and found
accurate within the limits prescribed in Section 600.310. This test shall be
made either by the utility or the meter manufacturer. If made by the latter, the
utility must obtain a copy of the result of the manufacturer's test.