A single rate tariff means you’re charged the same rate for any electricity you use.

Time of use tariffs have different rates depending on the time of day the power is used.

"CL" refer to a "Controlled Load" tariff, a controlled load tariff is a separately metered charge for a specific appliance.

If you have a bill close by you can check the charges section as this will normally show you a breakdown of your usage and tariff type.