The Law of Rabbinical Courts (Marriages and Divorces) from 1953 establishes that matters of marriage for Jews in Israel, whether citizens or residents, are under the exclusive jurisdiction of rabbinical courts and are to be performed “in accordance with the law of Moses and Israel.” There is definitely room for personal expression, original additions, and emphasis on the reciprocal nature of the union, within the general parameters of the ceremony, but the ceremony must maintain its resemblance to the weddings of your grandparents. Weddings performed privately in Israel have cultural value, but they do not entitle one to a marriage certificate and are ineffective for registration and other economic benefits such as residence, health, education, insurance, and taxation. Though not civilly recognized, private marriages, which are performed in accordance with certain specific conditions, can be considered valid by Jewish religious law.
Marriages performed for Jews outside of Israel that are valid in the foreign country in which they were performed receive retroactive recognition by the State of Israel. This includes civil marriages and non-Orthodox marriages, and even intermarriages (as long as there is no suspicion that the marriage is a sham). This is the case for new immigrants who got married before coming to Israel in a civil, private, Conservative, or Reform ceremony, as well as for Israeli citizens who married in the course of a visit to a foreign country or traveled abroad specifically for this purpose. If you choose to travel abroad in order to get married, be aware of the price you will pay: the cost of the trip, your stay, the necessary documents, the absence of friends and relatives, and the fact that your marriage ceremony is estranged from the history and roots of your people and country. If your marriage should end in divorce, the fact that it was conducted civilly abroad does not exempt you (if you and your partner are both Jewish, and would like to have the option to remarry in Israel) from a halachic divorce in a rabbinical court.
The rabbi performing the wedding is considered, according to the Law of Population Registry of 1965 and the Law of the Chief Rabbinate of 1980, a representative of the official Marriage Registrar. The notice of the marriage is transmitted directly from the regional rabbinate to the Interior Ministry. This notice is not sufficient to change the family name of the wife, although in practice the change occurs automatically. The rabbi performing the wedding is also authorized, according to the Law of Financial Relations Between Couples of 1973, to put a financial agreement between the couple into effect, if they have agreed to arrange such a document. After the marriage, such an action will require certification by a religious or civil court. Additional civil laws establish that the bride has to be at least 17 years old (except in special cases), prohibit bigamy and polygamy, establish penalties for violations, and deal with the financial arrangements between the couple in the course of their marriage.