Knife- nope. Company policy.
Whistle- er, nope.
Bandana- used hankerchief qualifies doesn't it?
Flashlight- photon microlite on my badge lanyard and a maglite in my backpack within reach.

2 of the allowable 3.

I'm not allowed to cut myself from the rubble. (or anything else for that matter)

The dogtag or housekey around my neck would have to suffice.

I should ask for a supply of kindergarten paste to eat while I wait for rescue.