pre-specified amount of cash in the case of a divorce. The principal endowment pledged in a ketubah is 200 zuz for a virgin, and 100 zuz otherwise (such as for a widow, a convert, or a divorced woman, etc.). Today, such pledges are made in local currency, and often exceed that of the principal. Thus the content of the ketubah essentially dictates the wife's rights in the marriage and provides for her security and protection. (Conservative Jews often include an additional paragraph, called the Lieberman clause, which stipulates that divorce will be adjudicated by a modern rabbinical court (a beth din) in order to prevent the creation of a chained wife.) The conditions written in the marriage contract may vary between communities, as in the case of the Yemenite ketubah, where the custom in Yemen was not to consolidate the different financial obligations, or pledges, into one single, aggregate sum as is practised by some communities. Rather, all financial obligations were written out as individual components, and had the same fixed sums for all persons. The Chief Rabbinate in Israel has sought to bring uniformity to the ketubah, particularly where Jewish communities in the Diaspora had upheld conflicting traditions. As in most contracts made between two parties, there are mutual obligations, conditions and terms of reciprocity for such a contract to hold up as good. Thus said R. Yannai: "The conditions written in a ketubah, [when breached], are tantamount to [forfeiture of] the ketubah." A woman who denied coitus unto her husband, a condition of the ketubah, was considered legal grounds for forfeiture of her marriage contract, with the principal and additional jointure being written off. Bat-Kohen variation The Mishna and Talmud Bavli record that the "Beth-Din of Kohanim" would oversee that the ketubah of a Bat-Kohen would contract the amount of four hundred Zuz (an increase from the standard amount of two hundred Zuz) in the event the Bat-Kohen would be given a Get (bill of divorce) – the increase was written as the base amount due the Bat-Kohen and not as a bonus. The Talmud Yerushalmi opines that the Bat-Kohen who marries a non-Kohen receives that standard two hundred Zuz amount, as a penalty for not marrying within the greater family of Kohanim. Based on the research of A. Epstien, in his work "Toldot HaKetubah B'Yisrael", the recording of Four hundred Zuz in the ketubah of the Bat-Kohen