South Dakota Codified Laws — Title 10 (Taxation)
SDCL § 10-45-101 — Requirements for extension
The extension pertains only to equipment and machinery purchased and installed after July 1, 2001. No extension may be made unless:
(1) The project cost exceeds twenty thousand dollars; and
(2) The business applying for the extension obtains a permit from the secretary as set forth in § 10-45-103 .
Source: official text