If anyone sins unintentionally in any of the Lord’s commandments about things not to be done, and does any one of them, if it is the anointed priest who sins, thus bringing guilt on the people, then he shall offer for the sin that he has committed a bull from the herd without blemish to the Lord for a sin offering.
There are two important ideas here, first intentions and second headship. One need not be intentional in their sin for it to make them guilty. “Oh but he didn’t know any better.” That may make it easier to stop someone from repeating a sin, that is to say, simply make them aware that they are sinning, but that doesn’t remove the guilt. This should answer the question about people who live in different cultures with different concepts of right and wrong, that doesn’t matter for guilt. There is one standard, and that’s Jesus. Also, this idea of headship. The Priest sins and all the people are made guilty. We have a great high priest who will never sin, not only that, his perfection has made all of us guiltless. Praise the Lord!