Question about kitchen split receptacles and common trip breakers

[tortuga]

I should add their definition of a receptacle is more like what we call an outlet:

Receptacle — one or more groups of female contacts, each group arranged in a configuration, all
groups mounted on the same yoke and in the same housing, installed at an outlet and intended for the
connection of one or more attachment plugs of a mating configuration.

Duplex receptacle — a receptacle with two groups of female contacts.

Single receptacle — a receptacle with one group of female contacts.

Split receptacle — a receptacle with two or more groups of female contacts, having terminals
adapted for connection to one or more multi-wire branch circuits.