They are full of ambivalence in their statements. Only a couple of paragraphs earlier in the same chapter of that aforementioned book they say this:
7 Those who argue for continuance of certain features of the Law do not fully appreciate that a righteous standing with God depends, not on one’s works of the Law, but on one’s faith in the value of Jesus’ sacrifice. (Gal. 3:11, 12) They feel that a person must prove himself righteous by such works—something that is impossible for sinful humans. It is, indeed, important to do works in obedience to commands of God and Christ that apply to Christians. (Jas. 2:15-17; Matt. 28:19, 20) These are a means of demonstrating our love and faith, and lack of them would indicate that our faith was dead. But we cannot earn salvation no matter how hard we work. No salvation from sin and death would be possible without the sacrifice of Jesus Christ. Thus eternal life is a gift from God through Jesus Christ, an expression of extraordinary undeserved kindness and not payment for our works.—Eph. 2:8, 9; Rom. 3:23, 24; 6:23.
8 When the issue involving application of the Mosaic Law to Gentile Christians was presented to the governing body in Jerusalem in the first century, their decision was in harmony with these facts. They recognized that Jehovah was not requiring Gentile believers to perform works in obedience to the Mosaic Law before holy spirit was poured out on them. The decision of that governing body did list as “necessary things” certain prohibitions that were in harmony with that Law, but these were based on the Bible record concerning events that predated the Law. So there was not an imposing on Gentile Christians of a responsibility to conform to the Mosaic Law or some portion of it but, rather, there was a confirming of standards recognized prior to Moses.—Acts 15:28, 29; compare Genesis 9:3, 4; 34:2-7; 35:2-5.
United in Worship of the Only True God (1984), chap. 19 p. 148, 149
