It is not an absolute change which is...
It is not an absolute change which is, in reality, an abrogation (replacing one law with another in toto), rather it is a process by which acting on a law is suspended while a changeover to another is effected till the causes of this suspension expire. This is a result of the fact that the criteria is subject to the benefits or harms existing in the essential nature of the act, like taking alcohol and fasting.
Drinking alcohol is an essentially harmful practice and its harmful relationship with the human body and mind can never change. For this reason its prohibition can never change, either. However, a concession is granted to one under duress to drink alcohol so as to arrest a more dangerous situation. Such a situation could be excessive thirst that could lead to death, in which case, one is allowed to partake in only that amount of alcohol necessary to deliver him from imminent death.
Allah, the Most High, states: "And whoever is forced to it without the desire (for it) nor to transgress (the limits) then it is no sin on him." Holy Qur'an (Baqara 2: 173) 2- Initial and Secondary Laws: Among the topics on legislation which are related with the criteria and the changing of rules is the question of initial and secondary rules.
This topic represents a wide area of addressing the issue of change on the subject of general living conditions, politically, economically, and individually, concerning worship, …etc. The classification of real laws `ahkam al-Waqi'iyya', into initial and secondary rules, is a direct consequence of putting into consideration the…