Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Marriage in Israel
Orthodox "halachic" rules apply to converts who want to marry in Israel. Under these rules, a conversion to Judaism must strictly follow "halachic" standards to be recognised as valid. The rabbinate even scrutinizes Orthodox conversions, with some who have converted by orthodox authorities outside of Israel not being permitted to marry in Israel. For example, a man who converted to Orthodox Judaism in the USA was denied an official marriage in Israel on the grounds that his conversion may not have been legitimate and that the Orthodox rabbi who converted him in Louisiana is not recognized in Israel.