What do you mean it was given to “all Israel”? Are you using a piece of land instead of people? The law was given to Jews at Mt. Sinai, for them and all their descendants.The Law was given to all Israel and administered by the Levites. It was the ritual and civil law of Israel as a theocracy.
Until the death of Herbert W. Armstrong, the Worldwide Church of God did. Some 'breakaway' ministries still do. The difference was that we saw the advent and sacrifice of Jesus Christ as well as the future destiny of the church in most of the rituals, especially the annual holy days.