Section 51

British-era Indian law recognized that not everyone would swear a religious oath (some communities or individuals objected to it on grounds of belief). So the law allowed a 'solemn affirmation' as a secular alternative with the same legal weight. Section 51 was drafted to make sure that later IPC provisions dealing with oaths (like perjury under Sections 191-193) would automatically also apply to affirmations and to other legally sanctioned declarations, so no one could escape liability for lying just because they affirmed instead of swore, or made a declaration outside a courtroom.

• Myth: Only a religious oath counts as an 'oath' under the law, so affirmations have lesser legal weight.
  Fact: Section 51 makes clear that a solemn affirmation legally substituted for an oath is treated exactly the same as an oath for all legal purposes, including penalties for lying.
• Myth: Oath-related laws (like perjury) only apply to statements made inside a courtroom.
  Fact: Section 51 extends the meaning of 'oath' to cover declarations required or authorized by law before any public servant, or used for proof — not just those in a Court of Justice.