The “terms of service” for the high priests of ancient Israel come directly from the Torah (the first five books of the Bible, especially Exodus, Leviticus, and Numbers). These were divine instructions given to Moses for Aaron (the first high priest) and his male descendants from the tribe of Levi. They weren’t optional user agreements but binding commandments, with the understanding that violating key aspects (like improper entry into the sanctuary or offering unauthorized fire) could result in death, as seen with Aaron’s sons Nadab and Abihu in Leviticus 10.
We now have a high priest from the tribe of Judah.
Hebrews 5:10 being designated by God a high priest after the order of Melchizedek.
Hebrews 7:27 He has no need, like those high priests, to offer sacrifices daily, first for his own sins and then for those of the people, since he did this once for all when he offered up himself.
Ephesians 1:17-21 English Standard Version
17 that the God of our Lord Jesus Christ, the Father of glory, may give you the Spirit of wisdom and of revelation in the knowledge of him, 18 having the eyes of your hearts enlightened, that you may know what is the hope to which he has called you, what are the riches of his glorious inheritance in the saints, 19 and what is the immeasurable greatness of his power toward us who believe, according to the working of his great might 20 that he worked in Christ when he raised him from the dead and seated him at his right hand in the heavenly places, 21 far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come.
So what are our terms of service?
John 3:3 Jesus answered him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.”