The High Court had directed the police to register a separate case for alleged tampering of evidence on May 5, 2006, when the trial in the Uphaar tragedy case was on.
The Ansal brothers had moved the court seeking modification of the November 26 high court order directing the trial court to make an "endeavour" to frame charges against them contending the order was passed without hearing them.
Gupta was the court staff who has been accused of conspiring with Ansals in the alleged tampering case. He was terminated from service.
"The trial court to frame charges by end of December. The prosecution will cooperate...,"the judge said while disposing of the application filed by Ansals and Gupta.
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The high court had on November 16 directed the trial court to frame the charges against them on December 2 and inform it by December 16.
They also submitted there will be a miscarriage of justice if the charges are framed against them on next date of hearing as the judicial files have insufficient documents.
The court had earlier passed the order on a plea filed by the Association of the Victims of Uphaar Tragedy seeking speedy trial of the case, which was pending before the lower court since 2006, against them.