The Lau master is required for the cheats to work. It has a conditional key because otherwise it will slow down the game, so only press that key when you want to activate the cheats.
Every cheat can slow down the game, so only activate the ones you need.
There are only two cheats you would likely need often: Health and Overdrive.
The conditional key placed on the master is not closed and that is intentional. Any cheat you create your own outside of mine needs to close it or it will be blocked by this if ZL then ..