Under the Bharatiya Sakshya Adhiniyam, 2023, which of the following is required to be proved essentially?

Under Section 3 of the Bharatiya Sakshya Adhiniyam, 2023 (formerly s.5 IEA), evidence may be given in any suit or proceeding of the existence or non-existence of every fact in issue and of such other facts as are declared to be relevant, and a party relying on a relevant fact must prove it unless exempted by law. By contrast, under Section 51 of the Adhiniyam (formerly s.56 IEA), facts of which the court will take judicial notice need not be proved, and under Section 53 (formerly s.58 IEA), facts admitted need not be proved; similarly, a valid and voluntary judicial confession admitting guilt does not require independent proof of the admitted facts.