California Code, Health and Safety Code - HSC § 100862

(a) At the time of application for TNI accreditation and annually thereafter, from the date of the issuance of the accreditation, a laboratory shall pay a TNI accreditation fee, according to the fee schedule established by the state board pursuant to Section 100829.

(b) In addition to the payment of fees authorized by Section 100829, laboratories accredited or applying for accreditation shall pay directly to the designated proficiency testing provider the cost of the proficiency testing studies.