The Christian Israelite Church combines both the teachings of the Old Testament (Israelite) and the New Testament (Christian). As particular aspects of the religion are outlined, you will see both these teachings observed.
Certain requirements regarding the uniform to be worn by covenanted members was laid down when the Church was commenced. This is to indicate that members desire to be spiritually separate from the world, for all to appear in one likeness and be recognised as being a member of the Christian Israelite Church. One such requirement is that members do not wear garments of mixed natural fibres, eg. wool and linen (see Leviticus 19:19), but try to purchase clothing of one fibre as they feel this is symbolical of keeping the physical body pure and not mixing good and evil. Members do not wear a garment which is solid black in colour as they believe black to be a symbol of death and they are aspiring to live without death.
Members are instructed not to wear clothing which has likenesses of anything God has created on them in order to obey the first and second laws of the Ten Commandments and to honour the Creator, and not the things created. In the same way, members are taught not to have statues, picture or likenesses in their houses, but to try to choose items of natural substance. By observing these instructions, there is more ability to keep the mind single to God and His Creation, looking to the future and not dwelling in the past (Isaiah 43:18,29 and Luke 11:34).
Uncovenanted members may wear the Church uniform if they have a desire to do so.