It is the duty of the county surveyor and the surveyor's deputies to test their instruments by the meridian line in the counties in which such lines may be established, and to note the variation of the compass, that is, the difference between the magnetic meridian and the true or astronomical meridian, at least once every six (6) months.
Tenn. Code Ann. § 8-12-111
Testing of instruments — Notation of magnetic declination
Acts 1871, ch. 120, §§ 2, 3; Shan., § 543; mod
Current official text: Tennessee Code (LexisNexis). Digitized from the UniCourt Code Improvement Commission public-domain capture. Reproduced from public-domain Tennessee statutes; confirm against the official source for the current text. Not legal advice.