The Silver Tigers program is a re-imagining of the main KAT curriculum for students who are 40 years old and over. It is still a highly effective martial art, yet it replaces some of the jumping, spinning, etc techniques that work so well for 20 year olds with versions that offer less chance of injury for older students. The program also replaces much of the ground grappling with standing versions.
Silver Tigers is also more self-defense based rather than sport based. Of course, older students are still welcome to learn the regular curriculum when they choose to.
Ask Master Bill for more information and the links to the requirements videos.