Only active members of the armed forces may wear military uniform; permission to do so should be sought from a commanding officer. In all circumstances, the traditions and rules of the particular armed service and unit should be researched and adhered to.
Each regiment has its own traditions and protocol for weddings: for instance, in some regiments it is not customary to wear uniform at all, and swords may or may not be worn.
The groom and best man should be dressed in the same style, so a member of the forces who wishes to wear uniform may reconsider if his best man is a civilian. In this case, the groom may wear a regimental tie instead.
A 'guard of honour' may be formed outside the church. If the guard are carrying swords or lances, these will be raised to form an arch, under which the bride and groom will walk upon leaving the church.