Every 3 months, as evidence by the authorities in the place where the installation and has a staff that is skilled engineering, inspection and record all year as evidence should be a code of conduct in local government.
Every three months, as evidenced by authorities in place of installation. And has a skilled engineering staff to monitor and record all the evidence one year should be regulations on the part of local government.
All the evidence 3 month by authorities in place the installation. And is staffed with skilled engineering check and records all the 1 years. Should the protocol in the local government .