OK. Found it. It is as I feared, a rule that has been promulgated under a broad
reading of certain Idaho Statutes. This is complicated, so bear with me please.
They are using IDAPA code 26.01.20 Rules Governing the Administration of Park
and Recreation Areas and Facilities, which says:
600. PERSONAL SAFETY, FIREARMS. "No person may discharge firearms or any other
projectile firing device, or otherwise purposefully or negligently endanger the
life of any person or creature within any land administered by the department.
All firearms brought onto lands administered by the department shall be unloaded
at all times and either out of sight, or in a vehicle, except when used for
legal hunting as authorized in Section 575 in this chapter, or for exhibition or
at designated ranges as authorized by the Director. (3-7-03)"
This sections authority is declared in 26.01.01:
000. LEGAL AUTHORITY. "The Idaho Park and Recreation Board is authorized under
Section 67-4223(a), Idaho Code, to adopt amend, or rescind rules as may be
necessary for proper administration of the department and the use and protection
of park and recreation areas subject to its jurisdiction. Prusuant to section
67-5206(5), Idaho Code, the Park and Recreation Board adopts these rules of
administrative procedure. (1-1-94)"
The first referenced authority: 67-4223. POWERS OF BOARD. The park and
recreation board shall: (a) Adopt, amend or rescind rules as may be necessary
for the proper administration of the provisions of sections 67-4218, et seq.,
Idaho Code, and the use and protection of park and recreational areas subject to
its jurisdiction. A violation of any rule promulgated by the board pursuant to
this provision which concerns the use and protection of park and recreation
areas is an infraction.
The second referenced authority: (5) (a) After July 1, 1993, the rules
promulgated by the attorney general under this section shall apply to all
agencies that do not affirmatively promulgate alternative procedures after the
promulgation of the rules by the attorney general. The rules promulgated by the
attorney general shall supersede the procedural rules of any agency in effect on
June 30, 1993, unless that agency promulgates its own procedures as provided in
paragraph (b) of this subsection.
(b) After July 1, 1993, an agency that promulgates its own procedures shall
include in the rule adopting its own procedures a finding that states the
reasons why the relevant portion of the attorney general's rules were
inapplicable to the agency under the circumstances.
All of which says that they are using the broadest possible interpretation of
the statute and it has not been tested per se, in court.
It has however been ruled by the Idaho Supreme Court, In re Brickey, 8 Idaho 597
(1902): "While it is, undoubtedly, within the power of the legislature to
prohibit the carrying of concealed deadly weapons, and such regulation is a
proper exercise of police power, yet the legislature does not possess the power
to prohibit the carrying of firearms, as the right to do so is guaranteed to the
citizen both by our federal and state constitutions."
In State v. Woodward, 58 Idaho 385 (1937), the Court reiterated: "Under the
Constitution, the right to bear arms may not be denied by the Legislature.
Section Il, art. 1; In re Brickey, 8 Idaho 597, 70 P. 609, 101 Am.St.Rep. 215, 1
Ann.Cas. 55. The Legislature only has the power to "regulate the exercise of
this right"; that is, among other things, it may prohibit carrying concealed
weapons, or prescribe the kind or character of arms that may or may not be kept,
carried, or used, and various other things of a regulatory character."
It would therefore seem to me that in the State of Idaho, the Legislature may
not grant authority to disarm its citizens as it does not have such
Constitutional authority. Any rule or regulation stating or interpreted
otherwise, can have no lawful effect. Since I'm not an attorney, you should
check with one who is knowelegible on Idaho Gun Laws.