Khalifah yana karɓar takamaiman hukunce-hukuncen Shari'ah waɗanda zai kafa su a matsayin kundin tsarin mulki da dokoki. Idan ya karɓi wani hukuncin Shari'ah, to wannan hukuncin kaɗai ya zama hukuncin Shari'ah da dole ne a aiwatar da shi, kuma ya zama doka mai ɗaurewa wacce kowane ɗan ƙasa dole ne ya biyayya da ita a fili da kuma a ɓoye.

The Khalifah adopts specific Shari’ah rules which he will enact as a constitution and laws. If he adopts a Shari’ah rule, this rule alone becomes the Shari’ah rule that must be acted upon and it becomes a binding law that every citizen must obey openly and privately.

Dalilin wannan Mas'ala ya samo asali ne daga Ijma'in Sahabbai (Ijma'i na gaba ɗaya) cewa Khalifa yana da ikon zaɓar wasu hukunce-hukuncen Shari'a. Haka kuma an tabbatar da cewa wajibi ne a yi aiki da hukunce-hukuncen da Khalifa ya zaɓa. Musulmi ba ya halatta ya yi aiki da wata hukunci sai abin da Khalifa ya zaɓa, koda kuwa waɗannan hukunce-hukuncen Shari'a ne da ɗaya daga cikin Mujtahidai (malaman Musulunci) ya zaɓa. Wannan saboda hukuncin Allah da ya zama wajibi a kan dukkan Musulmi shi ne abin da Khalifa ya zaɓa. Khulafa'u Rashidun sun bi wannan hanya; sun zaɓi hukunce-hukunce da dama tare da umurtar a aiwatar da su. Saboda haka Musulmi, tare da dukkan Sahabbai a cikinsu, suna aiki da waɗannan hukunce-hukuncen, suna barin Ijtihadinsu (ra'ayin Musulunci da aka samo daga dalilan Musulunci). Misali, Abubakar (ra) ya zaɓi a al'amarin saki wani hukunci da ya tanadi cewa saki uku idan aka furta su a zama ɗaya, ana ɗaukarsu a matsayin saki ɗaya. Haka kuma ya zaɓi a al'amarin raba dukiya ga Musulmi wani hukunci da ya tanadi cewa a raba dukiya daidai tsakanin Musulmi, ba tare da la'akari da dattako a Musulunci ko wani abu ba. Musulmi sun bi shi a wannan, kuma alƙalai da Walilai (gwamnoni) sun aiwatar da hukunce-hukuncen da ya zaɓa. Sa'ad da Umar (ra) ya hau mulki, ya zaɓi wasu ra'ayoyi daban da na Abubakar (ra) a al'amura biyu iri ɗaya; ya kafa hukuncin cewa saki uku ana ɗaukarsu a matsayin uku, kuma ya raba dukiya tsakanin Musulmi bisa dattakonsu a Musulunci da bisa buƙatunsu, maimakon raba daidai. Musulmi sun bi shi yadda ya kamata, kuma alƙalai da gwamnoni sun aiwatar da hukunce-hukuncen da ya zaɓa. Daga nan, Umar (ra) ya ɗauki wata doka da ta tanadi cewa ƙasar da aka ci da yaƙi ganima ce ga Bayt al-Mal (baitul-mali na Jiha), ba ga mayaƙa ba, kuma ƙasar za ta ci gaba da kasancewa ga masu ita, ba za a raba ta ga mayaƙa ko ga Musulmai ba. Gwamnoni da alƙalai sun bi wannan doka suka aiwatar da abin da ya ɗauka.