New Mexico Tech hosts the state-level competition of the Science Olympiad; see the Science Olympiad national homepage for an overview of this competition.
I have served as judge for the Sounds of Music event. See the event information page for links to the (unofficial) rules.
Here are scans of the current year's official rules from the judging manual:
I use a rubric of my own design to score the event. Here are rubrics from past years, in PDF format; please note that the rules change from year to year, so the old rubrics are not valid for the current year.