The Instrument of Government (Regeringsformen), which is one of Sweden's constitutional laws, states that Parliament should appoint one or more Parliamentary Ombudsmen and lays down some rules concerning the authority of the Parliamentary Ombudsmen. Chapter 13, Article 6 of the Instrument of Government. Parliamentary control.
The Riksdag Act (Riksdagsordningen) includes more details concerning the authority of the Parliamentary Ombudsmen, their number, how they are appointed, for how long they are appointed etc.
The Act with Instructions for the Parliamentary Ombudsmen (Lag [1986:765] med instruktion för Riksdagens ombudsmän - ”JO-instruktionen”) includes further descriptions of authorities and limitations, clarifications of the task and how the operations should be organised and reported.
Administrative Directives for the Parliamentary Ombudsmen (Arbetsordning för Riksdagens ombudsmän) contains regulations concerning rights and responsibilities for various civil servants in the organisation, how the work should be divided by area of responsibility, documentation etc. The Directives are set by the Chief Parliamentary Ombudsman.
Public Access to Information and Secrecy Act (Offentlighets- och sekretesslagen [2009:400]) includes secrecy provisions that apply to the Parliamentary Ombudsmen (JO).