According to the Architects Practice Act, when is an architect not responsible for damage to signed documents?

The correct choice highlights that an architect is not responsible for damage to signed documents when authorization is unreasonably withheld. This means that if a client is delaying or denying approval for necessary changes or modifications that ensure the project’s integrity, the architect should not be held accountable for any issues that arise from that lack of authorization. It underscores the importance of communication and agreement between the architect and the client. If the client fails to provide reasonable approval, then it is understood that the architect should not shoulder the responsibility for issues stemming from the client's inaction.

In this context, it is crucial for architects to have a clear understanding of their contractual obligations and the limits of their liability, particularly when external factors such as client decisions affect project outcomes. The dynamics of professional responsibility hinge on the level of cooperation and the reasonable progression of the project between the architect and the client.