9. Special services consist of any additional work related to the project requested in writing by the client. In particular, they include:(1) preparation of manuals for maintenance and operation of the installation;
(2) assignment of technical and auxiliary permanent staff on the worksite;
(3) overviews in the form of sketches or plans and specifications required for preparation of notices of change required by the client;
(4) participation in special committees for the choice of artists;
(5) any other service not provided in sections 4 to 8.