30 CFR § 28.23 Approval labels or markings; approval of contents; use.
(a) Approval labels shall bear the emblem of the Mine Safety and
Health Administration, an approval number, the restrictions, if any, placed
upon the use of the fuse by MSHA, and where appropriate, the applicant's name
(b) Upon receipt of a certificate of approval, the applicant shall
submit to MSHA, for approval of contents, full-scale reproductions of
approval labels or markings, as appropriate, and a sketch or description of
the method of application and position on the fuse, together with
instructions for the installation, use, and maintenance of the fuse.
(c) Legible reproductions or abbreviated forms of the label or
markings approved by MSHA shall be attached to or printed on each fuse.
(d) Each fuse shall be marked with the rating of the Underwriters
(e) MSHA shall, where necessary, notify the applicant when additional
labels, markings, or instructions will be required.
(f) Approval labels or markings shall only be used by the applicant
to whom they were issued.
(g) The use of any MSHA approval label or marking obligates the
applicant to whom it is issued to maintain or cause to be maintained the
approved quality control sampling procedure and the acceptable quality level
for each characteristic tested, and to guarantee that the approved fuse is
manufactured according to the specifications upon which the certificate of
approval is based.
(h) The use of any MSHA approval label or marking obligates the
applicant to whom it is issued to retest the approved fuse within a 2-year
period from the date of the certificate of approval, and every 2 years
thereafter, in accordance with the provisions of §28.10.
[37 FR 7562, Apr. 15, 1972, as amended at 43 FR 12316, Mar. 24, 1978; 45 FR
68935, Oct. 17, 1980]