When you are in a situation where a trustee has made an investment and someone thinks they have broken the rules, the court can look at some things to decide if the trustee is liable. The court can consider if the trust investments are spread out in a way that makes sense for the trust. The court can also think about whether the investment was made according to a plan, which is called an investment strategy, and if it followed the rules in section 30 to invest prudently. You can find more information about this by looking at the related laws. The court's decision will depend on the specific circumstances of the trust and the investment that was made.