I don't think what Peter is offering is workable. What's the legitimate amount of contact? Because what you're offering is just #1, your #'s 2 & 3 are just saying standard MLB, anything goes. So, focusing on #1, what's a runover, what's not? There are all sorts of contact, it's totally subjective.
And I don't see how being upright would be necessary to avoid a tag, see my comments below about avoiding the tag with slides.
Ok, so here's what I think... By the way, I was kidding when I labelled my viewpoint as 'influential'.
I umpired all ages for many years. The rule that was in place in several leagues I ump'd in was simply:
MUST SLIDE TO AVOID CONTACT OR YOU'RE OUT
so, if there's no contact, no slide necessary
Thus, if you are avoiding the tag upright and you pull it off, you're safe. But if in avoiding the tag upright you make contact, you're out for not sliding.
You can whizz past the catcher at full speed upright as long as you don't contact him. You only need to slide if the catcher is there with the ball and you're going to collide. At that point,
and only at that point, is it then necessary to slide.
Lincoln makes a fair point when he says "Incidental contact will certainly still occur but on obvious plays, runners who do not concede" will be banished. Of course, for us it would be that they are out. Also, he points out that this applies to not running over the middle infielder at 2nd base when he's trying to turn a double play. Think about it, you
want to slide or you can get hit in the face with the throw to first! Going back to plays at the plate...
You watch for the on-deck batter who's standing behind home plate facing the field. He can see whether it will be close, ie whether a slide will be necessary. If he's motioning down with both hands, slide.
And you can definitely avoid the tag, even if the catcher is there, with a good slide. If he is getting the ball even slightly late, go in under his legs and under the tag. If he's blocking, then you need to do an evasive slide, such as a hook slide. Slide to the side of home plate away from the catcher but
arm's length to the back of home plate. Reach back with your hand and catch the back of the plate as you evade the tag and slide past the catcher. Or you can do the same motion headfirst. Either way, do it on the side of the plate with the least coverage by the catcher.
The on-deck batter should always be in position to make the call for the runner coming in from 3rd.
I think this will rarely result in an out, if at all. Most people who don't want to slide are likely not to be sent from 3rd anyway on a close play. And colliding with the catcher is going to result in more damage than sliding will.
NOTE: if you do a headfirst slide, you MUST do it away from the catcher, ie at a full arm's length away from where he's standing at home plate.
The headfirst hook slide is only for advanced sliders. Doing it wrong can really hurt you. Use the evasive normal slide I described first unless you have that totally down and are comfortable enough to go for the headfirst slide.
Finally, and I know I always post these really long posts (sorry), but Nick, who initially had been in favor of standard MLB rules with collisions allowed, has backpedalled on that by now I bet because he hurt himself in the collision. I haven't talked to him, but I know he messed up his knee on the collison.
It will be interesting to hear Nick and Mike C's views on this.