Richard Rives is a very confused man. He is placing Christians under the law by what they eat, keeping the Sabbath, sin at the cross, etc.
Jesus Christ alone fulfilled the law for all men. Faith in Christ is the victory over sin and death. Rives is doing a disservice to the cross of Christ by placing believers back under the law. I believe he needs to study Galatians and read Romans 10:1-5. The law was not given to keep but to be our schoolmaster to bring us to Christ. No person can keep the law because we are all sinners.
Maybe I misheard Mr. Rives, but it appears his teaching is not biblical.