As we know, only testified civic customs can be quoted as the source of law by the judge, and the duty of testifying should be assigned to the party that asserts the customs.

• 在司法实践中，只有经过证明的民间习惯才能作为法律渊源而得到法官的引用，该证明义务应由主张习惯的一方当事人承担。