South Dakota Administrative Rules — Title 64 (Revenue)
ARSD § 64:06:02:86 — Marina defined
For the purpose of the tax imposed by SDCL 10-45D-7 , a marina is a business that owns or operates secure moorings for boats at a dock or basin. A marina includes any supply, repair, and other facilities provided in addition to secure moorings. A secure mooring is a boat slip or other device used to dock or store a boat for an extended period of time. The ability to tie a boat to a space for a short period, such as during dinner, is not a secure mooring.
Source: official text