In Michigan, what must be done before a mechanical installation can be used if it fails to meet code?

In Michigan, when a mechanical installation does not comply with applicable codes, the proper course of action is to correct the deficiencies and then ensure the system undergoes a re-inspection. This requirement serves to maintain safety standards and ensure that any installed mechanical systems operate effectively and without posing a risk to occupants or property. Re-inspection acts as a quality assurance step, confirming that any issues have been resolved and that the installation adheres to the established specifications and regulations.

The other options imply either leniency or inadequate action to remedy the situation. Suggesting that it may be used at the contractor's discretion or under conditions of documentation does not align with the principle of upholding safety and compliance. Lastly, reporting to authorities does not address the immediate necessity of correcting the installation, which is essential for allowing safe usage. Thus, correcting the issues and ensuring a thorough re-inspection is the correct procedure to follow in Michigan before the installation can be considered compliant and safe for use.