Non-compliance with the conditions and procedures contained in theseclauses may trigger the liability of the assignor. Less clear are the effects ofany such violation on the assignee. In practice, however, the assignee willoften have seen the contract including its restrictive assignment clause, andhis liability may as well be invoked. Therefore, the safest way for both assignorand assignee is to comply with the provisions of the assignment clause. Onemight thus say that these clauses provide for the machinery to make theassignee accede to the existing contractual relationship.