How can citizens of states without democratic elections be represented?

In countries without adequately free and fair elections democratic representation of the citizens in a Parliamentary Assembly will be very difficult. Nonetheless, such countries should be allowed to be represented as long as the delegates at least are chosen from within the constitutional national parliament, inclusive of opposition factions. An appointment through the government would have to be impermissible, and rules allowing an assembly to judge the independence of its own members should be considered.