PART I - RELEVANCY CHAPTER 2 - Qarinah When Opinion of Third Persons is Qarinah
Section 36. When opinion as to existence of right or 'urf is qarinah
When the Court has to form an opinion as to the existence of any right or 'urf, the opinions as to the existence as such right or 'urf of persons who would be likely to know of its existence, if it existed, are qarinah.
Explanation--- The expression "right or 'urf" includes right or 'urf common to any considerable class of persons.