The post doesn't seem to correctly describe the requirement.  I went to the referenced site and found the following Q2. What is an Engine Cut-Off Switch Link (ECOSL)? A2. An ECOSL is the device that connects the operator to the ECOS. The link must be attached to the operator, the operator’s clothing, or operator’s personal floatation device. It is typically a coiled lanyard, but may also be an electronic fob.   Q3. Who needs to use an Engine Cut-off Swith Link ECOSL? A3. All operators of recreational boats less than 26’ in length that have an Engine Cut-Off Device installed. Q9. My boat doesn’t have an Engine Cut-Off Switch, do I need to install one? A9. No, unless the boat was built on or after 1 JAN 2020. The installation requirement applies to manufacturers, distributors and dealers of “covered recreational vessels” after 1 JAN 2020. For those boats, an Engine Cut-Off Switch must be installed and the owner is required to maintain it. AS I read the info you do not need to install one on boats that do not have one and were built before January 2020.  However if your boat has such am ECOSL switch and lanyard you must use the lanyard regardless of when the boat was built. All the best, Gary Hagstrom Carckerjack Iron River, Wi.