Sequence (Muwalat) in the actions...
Sequence (Muwalat) in the actions, meaning that there should not be a time gap between the actions of Wudhu. One must not have the help of other people. There should be no constraint in using the water. There must be enough time to perform Wudhu. Summary of the conditions of Wudhu Issue 71: The Wudhu that is performed with Najis and mixed water is void - whether one knows that the water is Najis or mixed, or one does not know, of it the person had forgotten.
Issue 72: The water for Wudhu must be Mubah; therefore in the following instances, the Wudhu is void: • Performing Wudhu with water whose owner is not happy with his water being used (His displeasure is known). • That water which is not known if its owner is happy or not by its use. • Water that has been donated (Waqf) to specific people, which is used by other than those specified.
For example, the pools of most Madaras (schools) which have been given as a donation to those of that specific Madrasah (school), and the rooms of Wudhu in most Masajid that have been specifically donated for those people who read their Salat in that Masjid. Issue 73: Performing Wudhu from a large river or lake is permissible even if the person does not know whether its owner is content or not.
However, if the owner prevents one from performing Wudhu there, then according to Ihtiyat Wajib, one must not perform Wudhu there. Issue 74: If the water is in a usurped utensil, and one has no access to any other water, then one must perform Tayammum. If someone performs Wudhu with such water, his Wudhu is void. Issue 75: The parts to be washed or wiped in Wudhu - for example the face, arms, and feet must be Tahir.
Issue 76: If there is something on the face or arms that prevents water from reaching there, it must be removed in order to perform the Wudhu. Issue 77: If there is something on the areas that the wiping is to be done on (on top of the head or the feet) that does not prevent water from reaching there, it must still be removed, since there must not be anything between the hand and the area of wiping.
Issue 78: In the event that the effects of the ink of a pen, the spot of paint, and oil/grease, and cream are not remaining (on the skin) and it is not an obstacle or barrier for performing Wudhu, then it is not a problem. However, if it is a covering that prevents water from reaching the skin, then it must be removed.