BR Legacy loadcenter panel takes CTL and/or Non-CTL type breakers

To determine if the panel will accept CTL or Non-CTL duplex/quadplex breakers is by taking a look at the bus. The bus will either be notched and shaped like a U or it will be unnotched and solid. An example of this is below. Also, the publication on the door of the panel will list which duplex/quadplex breakers are to be used in the panel.