Orr's office said Thursday that guidelines on Duggan's role and responsibilities have been established.
Orr will continue overseeing the city's finances, police department and a new federal grant management program.
Duggan, who was elected in November, takes on financial matters relating to day-to-day functions of city government. Duggan also will appoint all non-civil service positions within his office, but they have to be approved by Orr.
Mayor Dave Bing, who did not seek re-election, complained that communication with the emergency manager's office deteriorated in the weeks after his Orr's March hiring.
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