The official text
Old and new, side by side
Indian Evidence Act, 1872
Section 51 Grounds of opinion, when relevant
Whenever the opinion of any living person is relevant, the grounds on which such opinion is based are also relevant.
An expert may give an account of experiments performed by him for the purpose of forming his opinion.
Bharatiya Sakshya Adhiniyam, 2023
Section 45 Grounds of opinion, when relevant
Whenever the opinion of any living person is relevant, the grounds on which such opinion is based are also relevant.
Illustration.
An expert may give an account of experiments performed by him for the purpose of forming his opinion.
The texts are India Code’s. The amendment markers and footnotes of the official print are left out, so the old section reads as it stood when it was repealed. The PDFs linked below carry the full history.