William R. Day,
Northern Pacific Railway Company v…
“ There can be no question as to the attitude of this court upon this question, as it has been uniformly held that the right to exercise the police power is a continuing one; that it cannot be contracted away, and that a requirement that a company or individual cannot be contracted away, nor can without compensation is the legitimate exercise of the power, and not in violation of the constitutional inhibition against the impairment of the obligation of contracts. ”
