Act 15:24 Forasmuch as we have heard, that certain which went out from us have troubled you with words, subverting your souls, saying, Ye must be circumcised, and keep the law: to whom we gave no such commandment:
Act 15:25 It seemed good unto us, being assembled with one accord, to send chosen men unto you with our beloved Barnabas and Paul,
Act 15:26 Men that have hazarded their lives for the name of our Lord Jesus Christ.
Act 15:27 We have sent therefore Judas and Silas, who shall also tell you the same things by mouth.
Act 15:28 For it seemed good to the Holy Ghost, and to us, to lay upon you no greater burden than these necessary things;
Act 15:29 That ye abstain from meats offered to idols, and from blood, and from things strangled, and from fornication: from which if ye keep yourselves, ye shall do well. Fare ye well.
Act 15:30 So when they were dismissed, they came to Antioch: and when they had gathered the multitude together, they delivered the epistle:
Act 15:31 Which when they had read, they rejoiced for the consolation.
This is the actual letter that went to the gentile churches. The position of the judaizers was rejected. Only certain necessary things were required and no greater burden was placed on them. There is no mention of later going on to keep all the law as the judaizers wished. There is no mention of growing into other commands of the law.
Now if the law was really something they should be keeping, why not encourage them to do it? Why refer to the message as troubling? Why would the council intentionally delay them observing something that they should observe?
Years later James still holds to the same requirements.
Act 21:24 Them take, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and keepest the law.
Act 21:25 As touching the Gentiles which believe, we have written and concluded that they observe no such thing, save only that they keep themselves from things offered to idols, and from blood, and from strangled, and from fornication.