Section 9 states, “Any person while carrying a pistol unloaded and in a closed opaque case or secure wrapper”. Whoa! So I can take my firearm anywhere that is legal (excluding post officers, schools, jails, etc) as long as it is in a closed opaque case or secure wrapper?
First I would like to compliment you on the work you put into this.
(Even though I am going to say "but" the compliment still stands.)
But as I recall we had a similar discussion based on my question "What constitutes On Your Person". It came from:
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RCW 9.41.050
Carrying firearms.
(1)(a) Except in the person's place of abode or fixed place of business, a
person shall not carry a pistol concealed on his or her person without a license to carry a concealed pistol.
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It was the consensus that when one was "taking anything with them it was considered carrying". I also asked the question of the "briefcase" which would be similar to your "opaque container" or "lock-box".
Since most felt that the answer to my "scenario" was that I would still be carrying a concealed pistol (notice that the statute does not mention "loaded" or "unloaded", but merely "pistol".
Based on my read of the above, and somewhat bolstered by the answers by others in the thread I started, I would believe you might be cited for unlawful carry of a pistol.
Again, good job on assembling the information and putting forth your argument. I wonder if it would float in court.