City of Phoenix v. Super. Ct
In City of Phoenix v. Super. Ct., 184 Ariz. 435, 909 P.2d 502 (App. 1995), the contractor possessed a Class A license, but had failed to obtain a Class B license because it had not been thought necessary.
After the contractor had submitted a bid on a project for the City of Phoenix, the ROC issued a contrary opinion. 184 Ariz. at 438, 909 P.2d at 505.
The Court held that the contractor had "substantially complied" with the statute because the error was caused in part by the ROC, the contractor obtained a Class B license as soon as it discovered that it needed to do so, and the City was not prejudiced by the temporary failure to comply. Id.