Here is a breakdown of Chapter 00 with the:
RULES AND REGULATIONS RELATING TO ADMINISTRATIVE PROCEDURES FOR THE DEPARTMENT OF TRANSPORTATION SERVICES, CITY AND COUNTY OF HONOLULU
Subchapter 3: Activities Prohibited on Public Conveyances
§00-00-21 Activities prohibited on special transit service vehicles. (which appears to also generally apply to other transit service vehicles -CB).
(Relevant section)
(5) Carrying or possessing any flammable, combustible, explosive, corrosive, or highly
toxic liquid or other substance, article or material which is likely to cause harm to others or
to emit any foul or noxious dust, mist, fume, gas, vapor, or odor; provided that nothing
contained in this subdivision shall be construed as prohibiting a person from carrying or
possessing any match or any cigar, cigarette, or pipe lighter, which is not lighted or
smoldering;
Which breaks down as:
Carrying or possessing any flammable, combustible, explosive, corrosive, or highly Toxic liquid;
Carrying or possessing any substance, article or material which is likely to cause harm to others;
Carrying or possessing any substance, article or material which is likely to emit any foul or noxious dust, mist, fume, gas, vapor, or odor.
Lastly, you are not required to disclose that you have a firearm to anyone; you are not required to show your items to the bus driver; you are not required to open a case, bag, or other personal belongings.
And, presence of a gun case is not probable cause that there is a firearm present; the mere presence of gun in and of itself is not probable cause for a search or detainment; and, you could be first up on a Federal lawsuit against TheBus if they are indeed being stupid!
ANyways, this is just how I read it.