27.7.2 Statutory and Post Installation Thorough Examination 

Vacuum lifters must be thoroughly examined, as recommended by this code, at intervals not exceeding six months. For some applications, it may also be necessary to have the installation thoroughly examined by a Competent Person before the vacuum lifter is put into service. This may be necessary to ensure that the operation of the lifter in practice complies with theoretical predictions. (see section 27.8 INSTALLATION AND COMMISSIONING)