California Code
CHAPTER 5 - Monitoring Devices
Section 42704.

42704. After the state board has made a determination of availability, the state board may, as appropriate, revoke or modify its prior determination of availability if circumstances beyond the control of the state board, or of a stationary source required to install a monitoring device, cause a substantial delay or impairment in the availability of the device or cause the device no longer to be available.

(Amended by Stats. 1976, Ch. 1063.)