IV.5.6. Intellectual property rights  concerning  Software  — confidentiality  ................................. 26 IV.5.7. Escrow rider  ................................................................................................ 26 IV.6.1. Common provisions  ....................................................................................... 28 IV.6.2. One –shot repair of  Hardware  ........................................................................... 28 IV.6.3. Maintenance  ................................................................................................ 28 IV.7.1. Types of  Services  .......................................................................................... 32 IV.7.2. Time-and-means Contracts  .............................................................................. 33 IV.7.3. Quoted Time-and-Means Contracts  .................................................................... 33 IV.7.4. Fixed-price Contracts  ..................................................................................... 34 IV.7.5. Stability of  Services  ........................................................................................ 34 IV.7.6. Timetable  .................................................................................................... 34 IV.8.1. Compliance with technical specifications  .............................................................. 36 IV.8.2. Acceptance  ................................................................................................. 36 IV.8.3. Guarantee of proper operation of  Commissioned software  ......................................... 37 IV.8.4. Intellectual property rights  and ownership of source code  ........................................... 37 IV.8.5. User manuals and  Documentation  ...................................................................... 37 IV.8.6. Interfaces and  Compatibility  .............................................................................. 38 IV.9.1. Instructors  ................................................................................................... 39 IV.9.2. Organisation of courses  ................................................................................... 39 IV.9.3. Instructor's manual  ........................................................................................ 39 IV.9.4. Provision of training  Software  ............................................................................ 39 Page 2 of 40 