20 C.F.R. § 655.13
(b) NPWC review. Upon the receipt of the written request for review, the NPWC Director will review the employer's request and accompanying documentation, including any supplementary material submitted by the employer, and after review shall issue a Final Determination letter; that letter may:
(c) Request for review by BALCA. Any employer desiring review of the NPWC Director's decision on a PWD must make a written request for review of the determination by BALCA within 10 business days from the date the Final Determination letter is issued.