گفته شد که شروط التکلیف سه‌اند: البلوغ، القدرة و العقل. اکنون به‌طور مختصر به بحث الأهلية (شایستگی یا صلاحیت)، اقسام آن و موانع یا اموری که مانع آن می‌شوند، می‌پردازیم:

It has been mentioned that the Shuroot of At-Takleef are three: Al-Buloogh, Al-Qudrah and Al-‘Aql. We will now examine the subject of the Ahliyah (competence or qualification) and its categories and its obstacles or preventative matters in summary:

الأهلية في اللغة: الصلاحية والملاءمة، ولذلك يقال: فلان أهلٌ للعمل في كذا، إذا كان صالحاً له.

Al-Ahliyah linguistically means: As-Salaahiyah (suitability, appropriateness) and so it is said: The man is Ahl (suitable/appropriate) to work in such and such a field, in the case where he was Saalih (suitable) for it.

الأهلية بحسب اصطلاح الأصوليين: هي صلاحية الإنسان واستعداده لما يُنسب إليه من حيث الأداء أو لما يُثبت له أو عليه من حقوق (أي الكفاءة).

Al-Ahliyah according to the Istilaah of the Usooliyeen: It represents the aptness or suitability of the human in respect to that which is assigned to him in terms of performance or what is assigned to him or upon him in terms of Huqooq (rights) (i.e. competence).