Which of the following is a key responsibility of an authority having jurisdiction?

The key responsibility of an authority having jurisdiction is to interpret and apply codes. This role is crucial within the regulatory framework surrounding mechanical systems, as these authorities ensure that all mechanical installations comply with established codes and standards. By interpreting the codes, the authority can evaluate whether the design and implementation of mechanical systems meet safety, performance, and environmental criteria. This authority acts as a gatekeeper, assessing compliance to ensure that public health and safety are maintained.

The other options represent functions that are typically outside the purview of an authority having jurisdiction. For example, providing mechanical design services is more aligned with engineers and designers who create and plan mechanical systems rather than regulatory bodies. Managing construction projects falls into the domain of project managers and contractors, who are responsible for executing the construction process. Developing new mechanical codes is primarily the responsibility of organizations and committees that draft and establish these standards, rather than the authorities whose role is to enforce existing codes.