Hi RD Designs. Did you know that there’s a function called “My Designs” where you can highlight an element and save it for re-use in the same site (or any other site on your dashboard. You could maybe save your legal notice there and just insert it from there see Wix Editor: Saving and Reusing Customized Elements (My Designs) | Help Center | Wix.com
I was thinking of the entire page, instead of using the “duplicate” feature, but if you just want one element, try My Designs 