What EXACTLY do i need to get inducted into NHS (National Honor Society)?

I received a letter from school today saying that i met the academic requirements, i'm sure i've met the service requirements, and definitely the character, but as for leadership, i'm not sure where i stand. It says that it needs recognized leadership roles in the school and/or community since starting high school, and i'm not sure what exactly qualifies as a leadership position. Does that mean you have to be president/vp/treasure/sec of a club or anything along those lines or what? We have not received applications or have had any informational meetings, so i'm getting a bit antsy. If anyone could help me out, i'd appreciate it very much. Thank you.