The Constitution of the Caliphate State, Article 42: The Khalifah appoints a delegated assistant or more for himself, who carry the responsibilities of ruling. So he delegates to them the management of affairs, where they  conduct them according to their opinion and Ijtihad.

On the death of the Khalifah, the role of his assistants ends, and they do not continue in their work except for the period of the temporary leader.

The Constitution of the Caliphate State, Article 43: The conditions for the assistant are the same as the conditions for the Khalifah; in other words, to be male, free, Muslim, adult, sane, just; and he is from the people of the capability in whatever actions were delegated to him.

The Constitution of the Caliphate State, Article 44:It is a condition for the empowering of a delegated assistant (Tafwid), that his empowerment encompasses two issues: The first being general responsibility, and the second being the representation. Accordingly, it is necessary for the Khalifah to say to him I appoint you on my behalf as my deputy” or anything that is of a similar meaning from the wordings that encompass the general responsibility and representation. This authorisation enables the Khalifah to send the assistants to specific locations, or transfer them to other places and other work as is required as the assistant of the Khalifah, and without the need for a new authorisation since it all falls under the original empowerment. 

The Constitution of the Caliphate State, Article 45 :The work of the assistant is to report to the Khalifah after whatever he has executed of the actions of management, and whatever he implemented of government and guardianship, in order that his powers do not become like that of the Khalifah. Therefore, his work is to raise his reports and to implement whatever he is ordered to.

The Constitution of the Caliphate State, Article 46: It is imperative that the Khalifah scrutinises the actions of the delegated assistants (Tafwid) and their management of the affairs, in order to confirm what was right, and to correct any errors, since the management of the affairs of the Ummah has been delegated to the Khalifah and is decided by his Ijtihad.

The Constitution of the Caliphate State, Article 47: If the assistant conducted an issue, and the Khalifah ordered him to do it, then he must implement it as the Khalifah ordered him to do so, without any addition or deletion. If the Khalifah returned to oppose the assistant rejecting what he has already executed, then the matter is examined; if it was a rule that he had implemented properly, or wealth that he placed in  of its right place, then the opinion of the assistant is implemented, since it is in origin the opinion of the Khalifah, and the Khalifah cannot revoke what he himself had implemented of rules and spent of wealth. If what the assistant had executed was in anything else, such as appointing a governor or preparation of an army, then it is permitted for the Khalifah to oppose the assistant, and the opinion of the Khalifah is implemented, and the actions of the assistant are cancelled because the Khalifah has the right to redress his own action so he may redress the actions of the assistant.

The Constitution of the Caliphate State, Article 48: None of the delegated assistants (Tafwid) specialises in a specific department from the departments of the administrative institution, rather his responsibility is general, since those who undertake the administrative affairs are employees (civil servants) and not rulers, while the delegated assistant is a ruler. He is not entrusted with a specific authority in any of the tasks since his responsibility is general.