The court ruled the Prime Minister has the powers to appoint Parliamentary Secretaries under the Constitution.
Opposition Leader, Ishmael Kalsakau and Opposition MPs filed a constitutional case last month challenging the validity of the PS positions, saying they have no legal basis and have wasted millions of public monies.
Outside the courthouse on Monday, Kalsakau said his lawyer will go through the judgement before they decide what further action they would take.
“We will read the judgment before we go to the Court of Appeal.”