Matt. 27 :37 And set up over his head his accusation written, THIS IS Y'SHUA THE KING OF THE YAHUDIM. New King James Version replacing Jesus and Jews with Y'shua and Yahudim, respectively.
If Y'shua is the King of the Yahudim, or of those who praise IEUE, it follows that the Yahudim will embrace the laws of the Kingdom. Y'shua and the Apostles kept the Law (Torah). Below are articles pointing out some aspects of law and testimony keeping for today.
The New Covenant is illustrated in Theodore Moran's article Escaping from Mystery Babylon.
Keeping YHWH's appointed times.
Link to article on ancient Biblical apparel.