found this..but I have no idea whose rules the NLRHF goes by...
In the first ever IBO Trad Worlds held just this month, there was a primitive class. Heretofore there was none, and it seems the class will only exist at future World Championships.
The rules were:
Primitive (PRM)
Bow – No man made material can be used on bow except string material and glue.
Arrow – Must be wood, bamboo or cane.
Other regulations same as current rules for LB:
A Primitive bow shot with fingers directly contacting the bowstring using a glove,
finger tab, or bare fingers, Archers may use up to two (2) nock locating
devices, but they must use the same nocking point and anchor point for each
shot and the index finger must contact the string in the same place for each
shot. The index finger must touch the nock of the arrow. Face and/or string
walking are not permitted.
No sighting device of any kind may be used. There shall be no markings on the bow or
bowstring (intentional or accidental) that could be construed as sighting marks. No type of
draw check or clicker may be used. Arrows shall be made of wood, bamboo or cane and shall be identical in length, weight, and color (allowances shall be made for normal wear). Arrows shall be shot off the hand or shelf of the riser. PRM archers will shoot from the Orange stake.
A Primitive Bow shot in PR shall conform to the following specifications:
1. The bowstring, when the bow is strung, may only contact the nocks of the bow.
2. The riser should be cut no closer than 1/8 inch to the outside of the centerline of the
bow, however, if a riser is cut less than 1/8 inch to the outside of the centerline of the
bow, a pad may be added so that the arrow rests on a surface no closer than 1/8 inch
outside the centerline of bow.
3. No stabilizers, counterbalances, or weights of any kind may be attached or built into
the bow; except a bow quiver clearly designed to hold arrows.