Tritium powered devices

Why is it legal to have a tritium powered scope on a rifle but not on an archery sight on a bow?
Illegal to use..
Rifle & Shotgun... "With any electronic device attached to, or incorporated
on, the firearm or scope; except scopes containing battery
powered or tritium lighted reticles are allowed."
Archery... "With any electronic or tritium-powered device attached
to an arrow, bolt or bow. Except disabled archery permit
holders may use a non magnifying sight with battery
powered or tritium lighted reticles.

Answer: 

The Idaho Fish and Game Commission support equipment regulations for archery and muzzleloader equipment that are consistent with the primitive nature of the weapons.

Answered on: 
Tuesday, February 17, 2015 - 1:17 PM MST