The Institutions of State in the Khilafah by Hizb ut-Tahrir

The time term of the Khalifah in office is not determined by a certain period. As long as the Khalifah abides by the Sharia, executes its laws and is able to perform the duties of the State and the responsibilities of the Khilafah, he remains in office. This is because the texts concerning the bayah came as undefined (mutlaq) and were not restricted to any specific period of time. Anas b. Malik reported that the Messenger of Allah (PBUH) said: .

"Do hear and obey, even if you were ruled by an Abyssinian slave, whose hair is like the raisin". [Bukhari, Sahih, #7142] .

In another narration He (PBUH) said: .

"…as long as he leads you by the Book of Allah". .

Furthermore, all the Khulafa Rashideen were given an undefined (mutlaq) bayah which is the one mentioned in the Ahadith. They were not of a limited period (in office). Each one of them assumed the post of Khilafah until he died; and this represents a general consensus from the Sahabah (ra), confirming that the Khilafah is not of a limited term of office but is unrestricted. Thus if a Khalifah is given a bayah, he remains in office until he dies.. However, if the Khalifah underwent a change that made him unfit for the post, or necessitated his removal, his term would be terminated and he would be removed. However, this cannot be interpreted as a limitation to his Khilafah term, but merely to indicate that a breach of the Khilafah’s conditions had occurred. For the wording of the bayah, confirmed in the Shariah texts and the general consensus of the Sahabah makes the Khilafah of an unlimited term of office. The term of office of the Khalifah is rather restricted in terms of the Khalifah’s undertaking of what he was given the bayah for, i.e. to rule by the Book and the Sunnah and execute their Laws. Thus if it were that he did not uphold the Sharia or did not implement it, then he must be removed.