You agree to abide by the self supported ethos and to obey the rules at all times.
You should carry all items on the recommended gear list. You should not plan to share gear with a partner. You have to be fully self-sufficient. Things go wrong. Gear breaks. Friends quit. Redundancy = having a backup plan. GPS units crash. The weather will turn. Trying to save ounces could cost your life.
The recommended gear list covers all MS and EX events.