An 18 year old female patient complains of prominent upper front teeth while smiling. Extra-oral examination reveals an acute nasolabial angle. Intraoral examination shows a Class II incisor relation with 5 mm overjet and Class I molar relation. Orthodontic therapy is initiated with first premolar extractions in all quadrants. The extraction space is to be closed by an equal amount of anterior teeth retraction and posterior teeth protraction. The anchorage requirement of this patient can be classified as: