HE did not lay down separate rules for this Natural Born or Adopted Children. The Rules are the same for all.
Numbers 15: 13 “‘Everyone who is native-born must do these things in this way when he brings an offering made by fire as an aroma pleasing to the LORD. 14 For the generations to come, whenever an alien or anyone else living among you presents an offering made by fire as an aroma pleasing to the LORD, he must do exactly as you do. 15 The community is to have the same rules for you and for the alien living among you; this is a lasting ordinance for the generations to come. You and the alien shall be the same before the LORD: 16 The same laws and regulations will apply both to you and to the alien living among you.