Ps each own and operate one of the approximately 613 licensed community currency exchanges in Illinois. The rates Ps and all other currency exchange licensees could charge for cashing checks and writing money orders were not regulated. The Legislature passed Section 19.3 which gave Callahan (D) the power to determine those rates. Ps question neither the right of the legislature to set maximum rates nor its decision to delegate to D the power to set maximum rates. Ps claim that the failure of the legislature to provide any intelligible standards or guidelines for D to consult in effectuating the statutory mandate to set maximum rates makes the statute an unconstitutional delegation of legislative power. The court ruled against Ps. Ps appealed.