What are the SPX Campaign Rules?

A seen a few post where the term spx campaign rules was used. What are said rules? Can anyone share?  Thanks in advance. 

$SVXY Covered Call

Just came onboard. Hoping to learn from everyone. Here is a trade I did earlier today.

Sold SVXY June 03 2016 59.50 Calls @ 0.90

I’ve been holding SVXY for a long time and I am finally almost at break even. Looking to unload them and maybe get back in the game when I learn more about these kinds of ETFs.