In+case+of+reduction+of the+contractual performance+of the+lender+of+services+in+favor+of the+p.a.,+Arranged+from the+itself+p.a.+for+reasons+of+finance+public,+the administration+exercise+a+power-duty+connotation+from +Discretion+administrative,+yes+that+the+controversy+that+it should be+to+not+can+be+donated+ad+referees,+being+the+competence+referee+limited+at+issues+engaging+exclusively+subjective rights.