a. date the notice is given b. exact address of the construction or civil engineering site c. nature of the project d. name, organisation number, address and telephone number of the client e. name, organisation number, address and telephone number of the client's representative f. name, organisation number, address and telephone number of the coordinators g. designation of designing undertakings and their organisation number h. designation of executing undertakings and their organisation number i. expected date of commencement of the work at the construction or civil engineering site j. expected duration of the work at the construction or civil engineering site k. expected maximum number of employees at the construction or civil engineering site at the same time l. planned number of undertakings.