The primary laboratory for all tuberculosis diagnostic purposes shall be the National Veterinary Services Laboratories (NVSL), Ames, Iowa. USDA Food Safety and Inspection Service (FSIS) laboratory results are acceptable for tissue examination of regular kill slaughter cattle or bison in those cases where no submission was made to NVSL. Other approved laboratories may be used for other approved supplemental tests.
Okla. Admin. Code § 35:15-40-33