Such types of obligation include the needs of the community...

Such types of obligation include the needs of the community like the need for doctors, soldiers, judges, farmers, traders and so on. In the same class is the burial procedures of deceased Muslims that the general Muslim population is commanded to perform, which, when performed by some, are no longer obligatory on any. Another way the obligations are divided is into t'ayini and takhiyiri .

A t'ayini obligation is that a special specified thing must be performed, like the daily prayers, fasting, Hajj , khums , zakat , commanding to what is recognized as good ( amr bi m 'aruf) , struggle ( jihad ), etc. A takhiyiri obligation on the other hand, means that the duty-bound is to perform one thing out of two or several things.

For example, if a person has intentionally not fasted one day during the holy month of Ramazan , it is a takhiyiri obligation for him either to free a slave, or to feed sixty poor people or to fast consecutively for two months. Yet another way the obligations are divided is into nafsi and muqaddami . A nafsi obligation means that the duty itself is the…