Sliding at home/second base?

[Marty Rogers]

The reason you can't find it is because
it is NOT there. There is no MUST SLIDE
rule in any baseball I know of.

The way I understand the HS rule is as follows:
The runner must slide OR avoid the fielder
on a force play at any base. If he slides
directly in a straight line to the base and
does nothing to alter the play (like pop up
right away and block the throw) he's OK.
If he legally slides and contacts the fielder
(not beyond base) this contact is legal.
He can't do anything to hinder the fielder's
attempt to throw for a DP (like slide away from
the base toward or into the fielder). He must
slide straight or avoid by veering off away
from the play. He may not kick his leg up
into the fielder, or interfere beyond the base.
A runner may go in standing up if he does not
contact the fielder or alter the play.

Whether the defense could have completed the
double play has no bearing on applying this rule.

In such interference, the batter and the
interfering runner shall be declared out
and no runners may advance.