MOMENTS after taking over as the new Mumbai police commissioner on August 21, R.H. Mendonca spoke his line: "There is a need for the Mumbai police to act now." And act it must. To bring a semblance of order to the underworld-mastered chaos that has gripped the country's commercial capital, and also restore the people's faith in the war-fatigued police. No tall promises but Mendonca says he means business.