What should a skip do if they notice a bowl that is not up to regulation?

If a skip notices a bowl that is not up to regulation, the appropriate action is to notify the umpire for further inspection. This is crucial because the umpire is responsible for ensuring that all equipment used in the game meets the established standards and regulations. By alerting the umpire, the skip allows for a proper assessment of the bowl’s condition and compliance with the rules.

This approach ensures that the integrity of the game is maintained, as the umpire has the authority to make an official determination regarding any discrepancies. It also provides a formal process to resolve the issue appropriately, allowing for a fair decision based on the established rules of the sport. In this context, the umpire’s expertise is fundamental to maintaining the standards of play.

The other options, such as continuing to play without addressing the issue or removing the bowl from the game immediately, lack the proper procedural follow-through. Consulting with the opposing skip may seem collaborative but does not adequately involve the umpire's authority, which is key in matters of regulation and compliance. Therefore, notifying the umpire is the correct and necessary course of action when there is a concern about equipment regulation.