High Court cannot permit filing of new documents after hearing arguments and reserving judgement

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It has been found that in many cases, after hearing arguments, Judge reserves judgements and permits counsels to file written submissions.

Sometimes, this system is misused and counsels file new facts, new evidence, which is unfair to other parties.

Supreme Court Case: Bengal Const v. Gupta Bldg case reported in Judgement Today 2013 (3) SC 192 Supreme Court dated 22.2.2013

SC: Life imprisonment means whole life, not 14 or 20 years

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In case of certain life convicts, in judgement reported in JT 2013(3)SC 20, it has been clarified that life imprisoonment means whole life. It does not mean that a convict has to be released after 20 years. This power to release early are wholly in hands of State.
The further questions arises are how these powers are to be exercised by State? Does it have arbitrary powers to grant powers?