Scripture, the word of God, says the law HAS been changed, so you stand in opposition to God.
Hebrews 7: 11-12 If perfection could have been attained through the Levitical priesthood—and indeed the law given to the people established that priesthood—why was there still need for another priest to come, one in the order of Melchizedek, not in the order of Aaron?
For when the priesthood is changed, the law must be changed also.
Further:
Hebrews 8:3-7
3 Every high priest is appointed to offer both gifts and sacrifices, and so it was necessary for this one also to have something to offer. 4 If he [Jesus] were on earth, he would not be a priest, for there are already priests who offer the gifts prescribed by the law. 5 They serve at a sanctuary that is a copy and shadow of what is in heaven. This is why Moses was warned when he was about to build the tabernacle: “See to it that you make everything according to the pattern shown you on the mountain.”[
a] 6 But in fact the ministry Jesus has received is as superior to theirs as
the covenant of which he is mediator is superior to the old one, since the new covenant is established on better promises.
7 For if there had been nothing wrong with that first covenant, no place would have been sought for another.
The old covenant could not make sinful people righteous. The new covenant does.
v. 13 By calling this covenant “new,”
he has made the first one obsolete; and what is obsolete and outdated will soon disappear.
The message is clear: Christians are NOT under the old covenant (the ten commandments, the law given at Sinai).