By Rabbi Yair Hoffman for 5tjt.com

Rav Yisrael Lifschitz (1782-1860), author of the Tiferes Yisroel commentary on the Mishna, posed the question as to why there is no longer Tumas Negayim in modern times.� Maran Rav Chaim zatzal identified another source that resolves the question � The Midrash Lekach Tov (Parshas Tazria explains that once the Bais HaMikdash was destroyed � there was no longer tumas Negayim.

As far as Negayim are concerned, the Tosefta 1:1 explains that the main idea is that the Cohen be proficient in knowing them, otherwise, he should not be involved in declaring Begayim.� In regard to matters other than Negayim, however, such as specific halachos is not to be considered as being �non-proficient.�

In regard to how Kohanim will know what to do in the Avodah when the Bais HaMikdash will be rebuilt (quickly in our days) it will not be a problem of non-proficiency.� What will happen b�ezras Hashem isall the sages of Israel will gather, and they will be machriah � as to which opinion will be followed. Even though we say that a later Bais Din may not negate the ruling of an earlier Bais Din unless it is greaterin both wisdom and in number, that is not what is happening.

https://orchotyosher.org/parshas-metzorah-non-proficiency/

for more Torah from Maran Rav Chaim zatzal go to orchotyosher.org