Under Texas boating laws what is required of children under 13 years of age while underway on a vessel less than 26 feet long?

In most states, and coastal waters of the US, children must be wearing their life vests on powered vessels, (and some sailboats) at all times unless the gunwhales of the vessel are sufficiently high enough to prevent their falling overboard. This precludes most vessels under 28 feet long. {oared vessels differ in these regulations from state to state, but generally are not covered under boating regulations for sail or powered vessels}.