To'rtinchi qoida shuni bildiradiki, xalifa qonunlar va qonun hujjatlarini qabul qilish uchun majburiy vakolatga ega yagona organdir. Buni sahobalarning umumiy kelishuvi (ijmo') isbotlaydi. Ushbu kelishuvga asoslanib quyidagi shar'iy qoidalar chiqarilgan: "Imomning fikri ixtilofni hal qiladi"; "Imomning fikri majburiydir"; "Sulton (imom) yuzaga keladigan ko'plab yangi masalalar uchun yangi qonunlarni qabul qilish huquqini o'zida saqlaydi".

The fourth principle, states that the Khaleefah is the sole body with mandatory powers to adopt laws and legislation. This has been proved by the general consensus of the Sahabah (Ijmaa’). Following this consensus these Shari’ah principles have been derived: “The opinion of the Imam settles the difference”; “The opinion of the Imam is binding”; “The Sultan (Imam) reserves the right to adopt new laws for as many new matters that arise”.

Bu narsa keyinroq, Xalifaning majburiy vakolatlari haqidagi bobda, dalillari bilan birga tushuntiriladi.

This will be explained later on together with its proofs, in the chapter on the mandatory powers of the Khaleefah.