A PKR lawmaker has taken Dewan Rakyat Speaker Pandikar Amin Mulia to court over the latter's decision to reject his two questions related to the 1MDB scandal.

Petaling Jaya Selatan MP Hee Loy Sian made the demand via an originating summons filed with the Kuala Lumpur High Court this morning.

Also named as a defendant is Dewan Rakyat secretary Roosme Hamzah.

"I feel that the reasons given by the speaker were unreasonable.

"The speaker must answer for his decision (to reject questions) because it relates to an important public interest issue," Hee told reporters at the Kuala Lumpur court complex.

Hee, who was represented by lawyers N Surendran and Latheefa Koya, said he had asked the prime minister to state whether Malaysia had formally objected to the claims made by the United States Department of Justice (DOJ) in its civil forfeiture suits related to 1MDB.

The MP's second question sought clarification from the home minister regarding the whereabouts of businessperson Jho Low and the latter's alleged dual citizenship.

Surendran, who described the suit as a "test case" for other MPs whose questions were similarly rejected, said the rejection of the questions has prevented the lawmakers from carrying out their duties to ask questions on behalf of their constituents.

"We are asking for a declaration that the act of the speaker in rejecting the questions on 1MDB is unconstitutional and void," he explained.

The PKR vice-president also said that such matters would ordinarily not be taken to court but his client was left with no choice after the parliament has been rendered as "not functioning properly" due to the rejection of questions.

"When we (MPs) can't ask questions, that means the parliament is not functioning properly.

"So we have no choice but to invoke the constitution and seek the court's assistance to ensure the constitution is adhered to and we are allowed to discharge our duties," he stressed.

Last week, opposition MPs had criticised Pandikar after he rejected more than 30 questions related to 1MDB for the current Dewan Rakyat session.

Defending his decision, the speaker said there were rules and procedures which must be followed, including that the questions might contain accusations, were based on assumptions, offensive, or made up.

At the time, Pandikar also pointed out that 19 questions about 1MDB have been approved to be included in the House proceedings.

He said the questions that were rejected had all violated standing orders for reasons including, that questions in the House must not be sub judice and affect court cases such as the DOJ suit.