All of the laws in Leviticus were set for the people to follow to atone for the original sin and get into heaven. When Jesus died on the cross, those sins were forever forgive, which is why now we don't have to follow those rules. Christ's death did away with ALL of the old laws.
The days are coming, declares the Lord,
when I will make a new covenant
with the people of Israel
and with the people of Judah.
32 It will not be like the covenant
I made with their ancestors
when I took them by the hand
to lead them out of Egypt,
because they broke my covenant,
though I was a husband to them,
declares the Lord.
33 This is the covenant I will make with the people of Israel
after that time, declares the Lord.
I will put my law in their minds
and write it on their hearts.
I will be their God,
and they will be my people.
34 No longer will they teach their neighbor,
or say to one another, Know the Lord,
because they will all know me,
from the least of them to the greatest,
declares the Lord.
For I will forgive their wickedness
and will remember their sins no more.
Jeremiah 31:3134
28 This is my blood of the covenant, which is poured out for many for the forgiveness of sins.
Matthew 26:28