If the owner remained insane throughout a year...
If the owner remained insane throughout a year, or part of it, Zakat will not be obligatory upon him. Issue 1869: If the owner of cow, sheep, camel, gold and silver remains intoxicated or unconscious during a part of the year, he is not excused from payment of Zakat, and the position is the same if at the time of Zakat becoming Wajib on wheat, barley, palm-dates and raisins, he is intoxicated or unconscious.
Issue 1870: * For establishing liability of Zakat on items other than wheat, barley, raisins and dates, it is necessary that the owner has a discretion over their disposal etc. And if he is prevented from that control because of usurpation, Zakat will not be wajib. Issue 1871: If a person borrows gold, silver or any other thing on which it is obligatory to pay Zakat, and it remains with him for a year, he should pay Zakat on it, and the lender has to pay nothing.
Zakat of Wheat, Barley, Dates and Raisins. Issue 1872: * Zakat on wheat, barley, dates and raisins becomes obligatory when their quantity reaches the taxable limit which is 300 saa' and it is said that it equals 847 kg.
Issue 1873: If a person and members of his family consume the grapes, dates, barley and wheat, on which payment of Zakat has become obligatory, or if, for example, he gives these things to a poor person without the intention of paying Zakat, he should give Zakat on the quantity used. Issue 1874: If the owner of wheat, barley, dates and grapes dies after Zakat on it has become obligatory, that quantity of Zakat should be paid from of his estate.
However, if he dies before Zakat becomes obligatory, each one of his heirs, whose share reaches the taxable limit, should pay Zakat from his own share. Issue 1875: * A person, who has been appointed by the Mujtahid to collect Zakat, can demand it at the time of harvest when wheat and barley are threshed and chaff is separated from grains, and when the dates and grapes become dry. And if the owner of these items does not give Zakat, and they perish, the owner should compensate for it.
Issue 1876: If payment of Zakat becomes obligatory on date tree and grapes or the crop of wheat and barley after one becomes its owner, one should pay Zakat on them. Issue 1877: If a person sells the crop and trees after Zakat on wheat, barley, palm-dates and grapes becomes obligatory, the seller should pay the Zakat on them, and if he pays, it will not be obligatory on the buyer to pay anything.