Yuqorida Xalifa tayinlanishi uchun zarur bo'lgan shartnoma shartlari keltirilgan edi. Boshqa hech qanday shart majburiy emas. Biroq, ba'zi shartlar majburiy bo'lmasa-da, afzal hisoblanadi, agar ular bilan bog'liq islomiy dalillar tasdiqlangan bo'lsa yoki ular sahih (ishonchli) matn bilan tasdiqlangan hukm ostida sanab o'tilgan bo'lsa. Shart majburiy bo'lishi uchun uning dalilida bu shartning majburiyligini ko'rsatuvchi qat'iy amr bo'lishi kerak. Agar dalilda qat'iy amr bo'lmasa, u shart afzallik tusiga kiradi. Yuqorida zikr etilgan yetti shartdan tashqari qat'iy amrni o'z ichiga olgan hech qanday dalil topilmagan. Shu sababli, aynan o'sha yetti shart shartnoma shartlarini tashkil etadi. Boshqa shartlarga kelsak, agar ularga oid hukm sahih deb tasdiqlangan bo'lsa, ular faqat afzallik shartlari hisoblanadi. Masalan, Xalifaning Quraysh qabilasidan bo'lishi, mujtahid bo'lishi yoki qurol ishlatishda mahoratli bo'lishi va shunga o'xshash shartlar, ularning qat'iy dalili yo'q bo'lgani uchun, shunday hisoblanadi.

Above were the contractual conditions necessary for the Khalifah to be appointed. No other conditions are obligatory. However, some conditions are preferable, whilst not being obligatory, if confirmed by Islamic evidences relating to them, or if they are listed under a rule that has been confirmed by a sound (Sahih) text. For a condition to be obligatory, it should have evidence which includes a decisive command to indicate that it is obligatory. If the evidence does not include a decisive command then the condition becomes one of preference. No evidence containing a decisive command has been found except for the seven conditions mentioned above. Therefore they alone constitute the contractual conditions. As for the other conditions, whereby a rule has been confirmed as sound, these would constitute conditions of preference only. This is like the stipulation that the Khalifah should be from Quraish, a Mujtahid or skilful in using weapons or the like, which have no decisive evidence.