This lecture delves into the intricacies of architect contracts, distinguishing between mandate and enterprise agreements. The instructor explains the legal implications of different contract types, such as when architects commit to plans or project management. The discussion also covers the concept of mixed contracts and the challenges posed by the separation of planning and construction supervision. Through real-life examples and legal analysis, the lecture explores the responsibilities of architects in contract termination, fee structures, and the implications of exceeding project budgets. The session concludes with a reflection on the importance of clear communication and diligence in architect-client relationships.