31. Egypt's constitution stipulates that sharia _ or Islamic law _ is the country's main source of law . 32. Russian law does not recognize judicial precedent as a source of law , but courts strictly follow such recommendations. 33. In order for custom to become a source of law , it must be approved by the competent legislator. 34. Legal fictions derive their legitimacy from tradition and precedent, rather than formal standing as a source of law . 35. Malaysia has two sources of law . 36. Apart from the Marriage Code, preparatory legislative materials are also used as a source of law in Sweden. 37. In Singapore, custom is a minor source of law as not many customs have been given judicial recognition. 38. In this sense, the precautionary principle is not a simple idea or a desideratum but a source of law . 39. Custom continued to play a limited role as a secondary source of law , but written legislation had a precedence. 40. The most analogous regulatory source of law for PayPal transactions comes from P2P payments using credit and debit cards.