Prinsesse Ingeborg (presentasjon av prinsesse Ingeborg i Aftenposten julen 1901; a presentation of Princess Ingeborg in Aftenposten at Christmas 1901, in Norwegian only)
The fundamental laws shall be modified or amended by means of two decisions of identical wording, and the second decision may not be taken before a general election has taken place and the newly-elected Parliament has convened (cf. The Instrument of Government Chapter 8 Art. 15).
Besides the above: Riksdagsordningen (The Parliament Ordinance; Act 1974:153 - in Swedish only), which contains more details regulations concerning the Riksdag and how it works. The ordinance constitutes a intermediate position between the Constitution and the ordinary acts, and can more easily be modified.