Reported as PLD 2019 Supreme Court 527 has enunciated the following binding principles:-

The august Supreme Court of Pakistan in Criminal Miscellaneous Application No. 200 of 2019 in Criminal Appeal No. 238-L of 2013 reported as PLD 2019 Supreme Court 527 has enunciated the following binding principles:- 

“ The Pakistan Penal Code, 1860 (P.P.C.) contains many offences dealing with perjury and giving false testimony. The very fact that there is a whole chapter, numbered XI, dedicated to such offences amply testifies to the fact that matters relating to giving of testimony were taken very seriously by those who drafted the P.P.C. and their continued retention in the P.P.C. ever since reflects the will of the legislature, which is the chosen representative body of the people of Pakistan through which they exercise their authority within the limits prescribed by Almighty Allah. The following sections, listed under Chapter XI titled "Of False Evidence And Offences Against Public Justice", highlight the fact that giving false testimony has been treated to be a very serious matter entailing some serious punishments. 

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 Holding that the rule falsus in uno, falsus in omnibus is inapplicable in this country practically encourages commission of perjury which is a serious offence in this country. A court of law cannot permit something which the law expressly forbids. 

21. We may observe in the end that a judicial system which permits deliberate falsehood is doomed to fail and a society which tolerates it is destined to self-destruct. Truth is the foundation of justice and justice is the core and bedrock of a civilized society and, thus, any compromise on truth amounts to a compromise on a society's future as a just, fair and civilized society. Our judicial system has suffered a lot as a consequence of the above mentioned permissible deviation from the truth and it is about time that such a colossal wrong may be rectified in all earnestness. Therefore, in light of the discussion made above, we declare that the rule falsus in uno, falsus in omnibus shall henceforth be an integral part of our jurisprudence in criminal cases and the same shall be given effect to, followed and applied by all the courts in the country in its letter and spirit. It is also directed that a witness found by a court to have resorted to a deliberate falsehood on a material aspect shall, without any latitude, invariably be proceeded against for committing perjury.”  

Part of Judgement of

IN THE LAHORE HIGH COURT, RAWALPINDI BENCH, RAWALPINDI.
Crl. Appeal-Against Conviction-PPC
66-18
2020 LHC 1958