The Temple Institute is designing the garments for the lay priests intended for purchase by Kohanim.

[8] In addition to a variety of items required for service within the Temple, the Institute has attempted to locate a parah adumah (red heifer) consistent with the requirements of Numbers 19:1–22 and Mishnah Tractate Parah for purposes of taharah (purification) necessary to enter the Temple sanctuary proper in most circumstances.

More recently in September 2022, 5 perfect unblemished red heifers were brought to Israel from the USA and found to meet the qualifications after being inspected by rabbis.

[12] Although Orthodox Judaism generally agrees that the Temple in Jerusalem will and should be rebuilt, there is a substantial disagreement about whether this should occur by human hands rather than divine will.

According to seventeenth-century rabbi Yom-Tov Lipman Heller, in his commentary on tractate Yoma, the Rambam did not say that Jews can build the future Temple without the guidance of the Messiah.

The view that Jews may ascend the Temple is controversial among Orthodox rabbis, with many authorities completely prohibiting visiting the Mount to prevent accidental entrance into and desecration of the Holy of Holies or other sacred off-limits areas.