Eye Ra: Can summon anywhere provided mission can still be accomplished. That dock spot shouldn't be allowed unless the Player can get back out to disarm bomb, etc. As far as I know glitch summoning is against the rules. And you'd have to ask Zero about the immunity thing.

Skywalking: Very simple. As long as you can hit them, its legal. If they can't be shot but can hit you it illegal.

Wards: The no wards in first few seconds relates to moling and dropping wards to kill off the entire opposing team in seconds. No Blocking of objectives. If Eye Ra summons you, you can drop ward regardless of where they summon you, as it is reflexive, and if they summon in the objective that was their risk to take. (Note: Everyone accidently drops one on objectives from time to time because of reflex, as long as you don't do it over and over.)

Doing the objective: No long term camping(IE: Don't wait the entire round out, make SOME progress). As admin, I usually won't say anything unless the round time left is under 1 minute and people aren't heading in the direction of the objective.If the bomb or objective becomes unobtainable, essentially becomes deathmatch rules, end it as quick as possible.

This is what I believe are the general rules for your question.