§ 24.7 - Approval plate.

(a) Design. Manufacturers shall attach, stamp, or mold an approval plate on each permissible single-shot blasting unit. The plate shall bear the emblem of the Mine Safety and Health Administration, and be inscribed as follows:

When deemed necessary, an appropriate cautionary statement shall be added. A photograph of the approval plate design will be supplied to the manufacturer with the approval letter. The size and position of the approval plate adopted shall be satisfactory to MSHA.

(b) Purpose. The approval plate is a label that identifies the device so that anyone can tell at a glance whether or not it is of the permissible type. By the plate, the manufacturer can point out that his blasting unit complies with MSHA's requirements, and that it has been approved for use in gassy mines.

(c) Significance. Permission to place the approval plate on his unit obligates the manufacturer to maintain the quality of his product and to see that each unit is constructed according to the drawings that have been accepted and placed on file by MSHA. Blasting units exhibiting changes in design that have not been authorized by MSHA are not permissible and must not bear the approval plate.