Can local police arrest someone on a military installation without prior approval from the Installation Commander?
Most agencies have standards of inter-departmental cooperation with which they usually comply. Military installations are Federal Government property and there might be a question of “jurisdiction” if the ‘local’ police were to effect an arrest on a federal reservation. But – that being said – there are always exceptions to every rule and there would have to be more information given by the questioner to render a more exact determination.