In sailing, it is quite normal to rely on measurement of equipment under a class or rating rule. There are checks competitors, classes and clubs can do to confirm that the results are fair.
All race categories under the Special Regulations require lifejackets in some way. Crews and Equipment Auditors should be aware what counts in a lifejacket.
Sports boats preparing safety equipment for regattas can use some terrific resources freely available on the Australian Sailing website and get help from accredited Equipment Auditors.