New laws giving extra powers to the police watchdog investigating the Hillsborough disaster, in which 96 Liverpool fans died, and cover-up are expected to clear Parliament on Tuesday night.
The legislation has already been agreed by MPs and is set to be passed by the House of Lords following a fast-track procedure.
Ministers say the new powers are essential to remedy the injustice, uncovered by the Hillsborough Independent Panel report published earlier this year, suffered by the victims of the 1989 disaster.
The actions of up to 2,400 serving or retired officers could be considered by the Independent Police Complaints Commission (IPCC) investigation - the watchdog's biggest ever investigation.
The Police (Complaints and Conduct) Bill, which has cross-party support, would enable the IPCC to compel serving officers or staff on other police bodies to attend an interview.
It will also have the ability to reinvestigate matters already considered by its predecessor, the Police Complaints Authority, in "exceptional circumstances".
Introducing the Bill's second reading, Home Office minister Lord Taylor of Holbeach said: "The Bill before the House today is essential to achieve justice for the 96 innocent men, women and children who died as a result of the Hillsborough disaster.
"This short Bill provides the IPCC with the tools it needs to and marks one step further along the road to justice for the victims of Hillsborough. All who support this aim will, I'm sure, support this Bill."