is-is redistribution question:

howdy ya'll ..

reading about isis for my bsci exam ...
the text is talking about isis route summarization.

the example used is;

loopback1 --> 3.3.3.3/32
loopback2--> 3.3.3.4/32
loopback3--> 122.122.122.122 /32

loopback 1 and 2 have "ip route isis" configuration as well, enabling
participation in ISIS routing.
loopback 3 does not.

in the isis configuration we have :

router isis
net 49.001.0000.0000.0001.00
summary-address 122.122.122.0 255.255.255.0 level-1
summary-address 3.3.3.0 255.255.255.0 level-1
redistribute connected level-1
is-type level-1


this is where Im kind of wondering what is happening.
is the command "redistribute connected level-1" means, redistribute
connected interfaces NOT participating in ISIS ?
or does it mean redistribute connected interfaces whether they are
participating or not ?


thanks,