My DD is now a junior in college, so YES - we did survive the high school years!
Things I would consider putting into written rules -there is no standard curfew. Your "time" to be home any particular night will be dependent on the activity, who is driving, what time the activity will be over etc. This worked very well for us.
While probably not an issue today, since I'm guessing that none of her friends are driving is - you may not be a passenger in a friends car unless you have specifically asked you and it has been approved. Where I live, people start to get driver's licenses as freshman, if they are 16.
There will be no late night cooking in the house. (The smell just drives me nuts, and keeps me from sleeping!). Microwaved stuff is fine - just do not turn on the oven,
No late nights during the week during summer vacation - as parents need their sleep to function appropriately at work the next day!
In the rules - I would also lay down some expectations on household chores, if any are expected. We backed off on this when DD was a junior because between 2 sports, a competitive problem solving team, AP classes and a job, and a steady volunteer gig she did at church, she really didn't have extra time for chores.
Consequences were loss of privileges. Didn't happen often, but it did make an impact. Before DD had a car - her "bad-attitude" consequence was to take the bus in the morning for about a week - usually I drove her to school. The yellow bus comes at 6:20, the "mom-bus" left the house at 6:45 or 6:50. We never took her phone as a consequence, as that would have been punishing us. I wanted to reduce her driving privileges after a speeding ticket, but DH and I were not on the same page, and we left it as - if you get a second ticket, then there will be a driving-related consequence. (Luckily - that did not happen.)
I would also put in a common-sense clause in a written set of rules, because you don't want to get caught in a technicality...i.e. MOM - it didn't say in the rules that I wasn't supposed to shoplift, toilet paper the neighbors house, jump onto moving trains, vandalize the school etc.
My best advice - mom and dad need to be on the same page as far as expectations and consequences. Don't forget - consequences in high school penalize the parents too, so pick and choose them carefully.