Ariel ben-Lyman HaNaviy makes a very good point in his teaching on Tzav this week. (Part A is great. Part B contains too much rabbinic mythology.) The book of Leviticus (aka Vayikra) is a manual for priests. Christian men claim to be the priests of their homes. LDS men claim to be priests of another sort. The Torah says that Israel is to be a kingdom of priests to the world, and John wrote that Yeshua has made all those who believe on him to be kings and priests. Here in Leviticus we have a manual for priests. Even though it was specifically addressed to the Levitical order, it is full of principles and patterns that apply to all priests of whatever order.
P.S. Here is an interesting thought. I have heard it taught that David was able to eat the bread of the Tabernacle without repercussion because he was also a priest, but of a different order. Being a foreshadowing of the Moshiach ben David, he too was a priest of the order of Melchizedek, which consists of a royal priesthood, men who are both kings and priests simultaneously. If Yeshua has made all those who believe on him to be both kings and priests, then this line of reasoning implies that all believers have the same (or parallel) responsibilities and privileges as the Cohanim. That does not mean that they are above the Law any more than David was. On the contrary, both priests and kings are held to a higher standard. I am not saying that this is a correct interpretation, only that it is a possibility worth considering.