When Jesus proclaimed that Peter was his Rock in Matthew 16:18-19, did he mean that Peter was given divine authority to change God's commandments and or statutes here on earth?
What Jesus was referring here was the legacy of the Torah from father to son. That's why he use the word "rock" (eben, in hebrew, is formed from the conjunction of the words father and son). He was putting Peter on a special place, and tell him that he has to be a leader based on the "old school" of the Torah, meaning that he has the responsibility of transferred the Jesus's interpretation of the Torah to the future members of the "first church". Of course the "new covenant" didn't change the commandments of the Torah and no one, not even Jesus as the Messiah, has the authority or the will to change anything(Mat 5:18). What happens on that council is a huge misinterpretation.
What did Jesus mean in Matthew 16:18?
Matthew 16:15-18 He saith unto them, But whom say ye that I am? And Simon Peter answered and said, Thou art the Christ, the Son of the living God. And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven. And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it
Some argue that Jesus was describing the statement that Peter had just made, that Jesus is "the Christ, the Son of the living God" as being the “rock” of faith that would be the foundation of the church.