change sudoers to stop asking for password when running a systemsetup comman To what exactly do I need to change sudoers file to prevent asking for password when I change system time zone?

This is the command I am going to run:

sudo systemsetup -settimezone timezone


I know I need to change it, but I feel uncomfortable changing sudoers on my own due to not knowing exactly what I am doing.
Was brave enough to do it myself. For future readers, add:

yourusername ALL=(ALL) NOPASSWD: /usr/sbin/systemsetup


after 

## User privilege specification
##
root ALL=(ALL) ALL
%admin  ALL=(ALL) ALL