18 CFR 1304.211 - Change in ownership of grandfathered structures or alterations.
(c) Subsequent owners are not required to modify to new standards existing shoreline alterations constructed and maintained in accordance with the standards in effect at the time the previous permit was first issued, and they may continue mowing established lawns that existed prior to November 1, 1999.
(d) New owners wishing to continue existing grandfathered activities and structures must:
(1) Maintain existing permitted docks, piers, boathouses, and other shoreline structures in good repair.
(2) Obtain TVA approval for any repairs that would alter the size of the facility, for any new construction, or for removal of trees or other vegetation (except for mowing of lawns established prior to November 1, 1999).