Policing and Crime Bill

While the Minister is on that subject, would he answer the point made by my noble friend Lady Walmsley, that under the Act he has just quoted it has to be a superintendent or above who exercises that power, whereas in this Bill it is a constable? Why do the Government feel that in the case of anti-social behaviour a more senior officer should do this, whereas in the case of alcohol, a constable can deal with it? What is the difference?