[Sting.]

I think I have seen commands that could only be used once per life. Which I mean is, like for example I spawn once, probably as a Cop , I use the command for example, /spikestrip and then the object is released but I can't use the command until I respawn. Is it like possible? One command per life. Another example, a simpler one. Ok, lets say I m playing a DM match and its free that everyone has a health kit. Once the player is hurt, he can use the /kit to heal himself. But the command can only be used once. The next time he can use it is when he respawns. Is this possible? Secondly, I wanted to know the same thing but a little different than the command above. Is it also possible that a player could use a command but then he can use it only again after 1/2 mins. He doesn't have to respawn? Are this even possible. Hope someone could answer my problems on this topic. Thanks in advance.