Five senior Liberal National Party MPs have been referred to Queensland Parliament's ethics committee, in an extraordinary move by Speaker Peter Wellington.

Mr Wellington said Opposition Leader Lawrence Springborg, Deputy Opposition Leader John-Paul Langbroek and MPs Tim Nicholls, Scott Emerson and Jarrod Bleijie breached Parliament's rules.

They raised during Question Time on Tuesday issues relating to an ongoing, separate ethics committee investigation into Police Minister Jo-Ann Miller.

It is alleged she failed to destroy confidential documents and then signed a false statement saying she had.

The Opposition has sought to highlight the issue on multiple occasions to score political points.

At the beginning of Parliament's sitting on Tuesday, the Opposition's Jeff Seeney raised concerns that information had been leaked from a private Parliamentary Crime and Corruption Committee meeting about a referral to the ethics committee.

The Opposition MPs then proceeded to ask questions about the alleged leak.

Mr Wellington said it was clear the questions were based on information they should not have had access to.

"Some of the questions this morning were clearly out of order as they contained imputations," the Sunshine Coast independent MP said.

"The unauthorised release of Parliamentary Crime and Corruption Committee information must cease."

Furthermore, he said the five MPs could explain their knowledge and failure to abide by standing orders to the ethics committee.

"The deliberate breach of standing order 271, which prohibits matters before the ethics committee being debated in the House, must also cease."

The Speaker has also asked 15 Opposition MPs to show cause why they should not be referred to the ethics committee for questions they asked about an education matter.

That will be decided next month.