I found it. So I don't contribute to the many useless search results I had to dig through before getting to something that worked, here it is:
Code:
if ($vbulletin->userinfo['ipoints'] < 1)
In my case, I'm hiding the next bit of code from anyone who has more than 1 infraction point. The "1" is the number of infraction points; change it to what applies to your forum.