The third condition: A person should offer prayers at a place where he sees the possibility of completing the prayers. To pray at a place where one cannot complete the prayers, because of strong winds, or heavy rains or a teeming crowd, will render Namaz void, even if one somehow manages to finish the prayers.

892. If a person offers prayers at a place where it is forbidden to stay, like, under a roof which is about to collapse, his prayers are in order, though he will have committed a sin.

Third Condition

829. The dress of the person should not be made of the parts of the dead body of an animal whose blood gushes when killed. Even if the dress is made of the parts of the dead body of an animal whose blood does not gush, for example, fish or snake, as per obligatory precaution, he should not use that dress for offering prayers.