Amber & Signage of Mysterious Meaning

Not to totally JD CRD's excellent coverage of Signage of Bafflement, but WTF, management company?

So, let's parse these instructions. If we're being told to either walk our bikes inside or lock them outside, something other than those two options must be happening to necessitate the sign. Are people riding their bikes inside? Or maybe locking their bikes inside? Walking your bike outside seems acceptable, so that's not the instigating issue. Given how narrow the hallway is, I am guessing that people couldn't really ride their bikes into the elevator. But, I'm one those people who can't even ride with no hands.

Then, the addendum to the instructions makes it even more cryptic. Did the courier service in the building get upset, thinking they were falsely accused? Or, are they above the rules? Maybe they can ride their bikes inside? Or lock them inside? And "as per management" refers to what? Is that the signature to let us know who left the sign? Or, maybe they are above the rules as per management?

What a baffling start to my work day.