30 CFR § 18.3
By appointment, applicants or their representatives may visit the
U.S. Department of Labor, Mine Safety and Health Administration,
Approval and Certification Center, 765 Technology Drive, Triadelphia,
WV 26059, to discuss a proposed design to be submitted for approval,
certification, or acceptance for listing. No charge is made for such
consultation and no written report thereof will be made to the applicant.
[33 FR 4660, Mar. 19, 1968, as amended at 43 FR 12314, Mar. 24, 1978]