In Orthodox Judaism, opinion is generally split between a view that maintains that those Biblical rules related to ritual purity that are possible to observe in the absence of a Temple and a Red heifer remain in force, and Jews remain Biblically-obligated to observe such of them as they can, and a view that Biblical ritual impurity requirements apply only in the presence of a Temple in Jerusalem, and the current rules represent only rabbinic ordinances, practices decreed by the Rabbis in memory of the Temple.