re-tightening every fifth year would be applied if the following criteria are met: the bolts and nuts used are certified, bolt securing from nord-lock is used and finally that the professional conducting the installation has received specific training.

This is all lower case. Can you fix that?
Re-tightening every fifth year would be applied if the following criteria are met: the bolts and nuts used are certified, bolt securing from Nord-Lock is used and finally that the professional conducting the installation has received specific training.