The different kinds of bows one could encounter at an Eastern Orthodox service are shown in the drawing below. Strict rules exist as to which type of a bow should be used at any particular time. The rules are very complicated, and are not always carried out in most parishes. Old Believers are generally much more punctilious about bows in comparison with the official Orthodoxy. Kneeling, standing on one's knees, is rarely prescribed or practiced. An exception is that the ordinand "bending both knees places his palms in the form of a Cross, and lays his forehead between them on the Holy Table" when a bishop is consecrated or a priest is ordained. In the 20th century in some western countries, some Eastern Orthodox churches have begun to use pews and kneelers and so have begun kneeling in some parts of the service. The First Council of Nicaea's decree "that prayer be made to God standing" from Pascha (Easter) through Pentecost, and on all Sundays throughout the year, in honour of the Resurrection is strictly observed, excepting only for prostrating before the Cross on the Third Sunday of Great Lent and on the Feast of the Exaltation of the Cross, if it falls on a Sunday, as well as for a few sacramental services, e.g., ordinations.