Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Eduncle Best Answer
Essentials of a valid custom can, broadly, be classified into – Formative Essentials and Operative Essentials. Antiquity, Uniformity/Continuity, Certainty and Conscious acceptance as of right, etc. are the essential formative elements of a valid custom. Custom possessing these elements is prima facia valid though it may be unenforceable if it is unreasonable, opposed to morality, public policy, express enactments of legislature and for want of proof; all these are invalidating elements. Therefore, in order to be valid, a custom must be reasonable, should not be opposed to morality, public policy, express enactments of legislature and must be strictly proved. All these are operative elements. Hence, in order to be valid custom must possess all the formative as well as operative elements.