This mod uses Client.rank to store the rank value. Typing announce(findclientbyname(yournamehere).rank); will announce your rank.
To check if a player's level is above a certain point, you could do something like this:
if(%client.rank >= 32)
return 1;
else
return 0;
This will return true when the player's rank is equal to or above 32, and false if it isn't