The Contract Documents form the entire agreement between Owner and. Design-Builder. Submit proposed modifications to Owner's form of Division 1 (General.This agreement allows you to create customized terms and conditions for different types of design engagements. During a service contract design effort, skipping interviewing your customers will reduce chances of you succeeding. Subcontractors and Suppliers. Written agreement clarifies expectations, prevents common misunderstandings, and helps you avoid potential legal problems.