LAW OF EVIDENCE 597
(5) The Evidence Act therefore makes the following exceptions to the general rule that the opinion of a witness is not admissible.
Sec. 45.
(1) The opinions of skilled or scientific witnesses (Experts) are admissible evidence to elucidate matters which are strictly of a professional or scientific character.
For instance.
(i) Question of foreign law.
(ii) Question of Science or Art (working of a gun machine).
(iii) Question of as to identity of handwriting or finger impression.
Sec. 47.
(2) On questions of identification of a person by whom any document was written or signed, the opinion of the person acquainted with the handwriting of the person is relevant.
Sec. 48.
(3) Where the Court has to form an opinion as to the existence of any general custom or right, the opinion of persons likely to know of its existence is relevant.
Sec. 49.
(4) When the Court has to form an opinion as to :
The usages and tenets of anybody of men or family.
The constitution and government of any religions or charitable foundation.
The meaning of words or terms used in particular districts or particular classes of people.
The opinions of persons having special means of knowledge thereon are relevant facts.
Sec. 50.
(5) When the Court has to form an opinion as to the relationship between two persons, the opinion of persons based on the conduct of parties and having special means of knowledge on the subject.