Well it is "the Rules of the Tribe of Levi" canonically speaking they are laws made not by God but by a bunch of priests. It is important for biblical historical context reasons but technically speaking these are ancient society laws. It's why instructional portions detailing animal sacrifice are included in that section when modern Christians tend to look at animal sacrifice as a satanic cult kind of thing.

Provided you are Christian ( before the atheists start in, I'm not - I just study the religion as a part of gaining historical background info) Using Leviticus to justify one's opinions on anything strikes me as showing that one read the text absent the scholarly context. A lot of Christians do this because book annotations wouldn't be a thing before 1000 AD and it really benefited a lot of powerful people to never mention context of the compiling process of the book because once the supposed less than divine fingerprints on the processed material are brought to light it weakens it's power as a tool of authority.