The Code of Canon Law, Canon 924 requires that the hosts be made from wheat flour and water only and recently made so that there is no danger of spoiling.
Kitab Hukum Kanonik, Kanon 924, mewajibkan agar hosti diolah dari tepung gandum dan air saja, serta baru rampung diolah, sehingga terhindar dari pembusukan.