Arbitrary rules and delays continue to make trade between Kenya and Tanzania expensive and difficult .
Kenyan businesses complain that the benefits of the Common Market only exist on paper by 2011 , and that all the work remains to be done .
Arbitrary rules and delays continue to make trade between Kenyan and Tanzania expensive and difficult .
Kenyan businesses complain that the benefits of the Common Market only exist on paper by 2011 , and that all the work remains to be done .