On the synopses my professor has been passing out, he includes passive prohibitions in the singular and plural. I imagine that one would make nollo into a passive imperative the same way that deponent imperatives are formed (nolle - sg, nolimini - pl) then supply the passive infinitive of whatever verb. So for say sedeo: nolle sederi - sg, nolimini sederi - pl.
I am most likely completely off on these though.
