What is a standard provision in CGL insurance that prevents coverage under certain conditions?

The correct answer focuses on a standard provision in Commercial General Liability (CGL) insurance known as "exclusions for professional services." This means that if a company is providing professional services — such as design, engineering, or consulting — separate from their construction activities, any issues arising from those services are generally not covered by CGL policies.

This provision is crucial because it safeguards against risks that are more appropriately covered by professional liability insurance. For instance, if a design flaw causes a project to fail, the costs associated with that mistake would generally not fall under CGL coverage but would rather be addressed by a policy specifically tailored to the risks associated with professional services.

In contrast, other options present scenarios that do not typically serve as standard exclusions in CGL insurance. For example, the completion of a project, accidental damages post-construction, and unintentional design errors may have coverage under different circumstances or be covered through other insurance mechanisms. Understanding these aspects helps professionals in the construction industry navigate their insurance needs effectively.