哈里发必须满足七个契约性条件，才有资格担任哈里发职位，并使对他的哈里发效忠（Bay'ah）合法地成立。这七个条件缺一不可。只要有一个条件未被遵守，哈里发契约便不会成立，并被视为无效。

The Khaleefah must satisfy seven contractual conditions in order to qualify for the Khilafah post and for the Bay’ah of Khilafah to him to take place legitimately. These seven conditions are necessary. If just one condition is not observed the Khilafah contract would not have taken place and it would be considered null and void.

缔约的条件有：

The contracting conditions are:

首先，哈里发必须是穆斯林；哈里发之位绝不允许非信徒担任，也不允许服从他。因为真主（SWT）说：

Firstly. The Khaleefah must be Muslim; the post of Khilafah is never allowed for the unbeliever, nor is it allowed to obey him. Because Allah (swt) says:

“而真主绝不会让不信道者有任何途径（权威）凌驾于信道者之上。” [TMQ An-Nisa: 141]

“And Allah will never (lan) give the unbelievers any way (of authority) against the believers.” [TMQ An-Nisa: 141]

统治是统治者对被统治者最有力的方式,因此"lan"(永不)一词意味着绝对禁止异教徒(Kafir)担任对穆斯林的任何权力职位,无论是哈里发职位还是其他任何权力职位。这进而禁止穆斯林接受异教徒来统治他们。