66
STAT.]
PUBLIC LAW 5 5 2 - J U L Y 16, 1952
"(9) The term 'permissible', as applied to equipment used in the operation of a mine, means equipment to which an approval plate, label, or other device is attached as authorized by the Director under section 212(a), and which meets specifications which (A) are prescribed by the Director for the construction and maintenance of such equipment, and (B) are designed to assure that such equipment will not cause a mine explosion or mine fire. "(10) The term 'premises' when used in referring to the premises of a mine, means the land within the mine's area of land. "(11) The term 'rock dust' means pulverized limestone, dolomite, gypsum, anhydrite, shale, talc, adobe, or other inert material, preferably light colored, (A) 100 per centum of which will pass through a sieve having 20 meshes per linear inch and 70 per centum or more of which will pass through a sieve having 200 meshes per linear inch; (B) the particles of which when wetted and dried will not cohere to form a cake which will not be dispersed into separate particles by a light blast of air; and (C) which does not contain more than 5 per centum of combustible matter, nor more than a total of 5 per centum of free and combined silica (SiOg). "(b) This title shall not apply to any mine in which no more than fourteen individuals are regularly employed underground.
Nonapplicability.
"INSPECTIONS
"SEC. 202. (a) For the purpose of determining whether a danger described in section 203(a) exists in any mine the products of which regularly enter commerce or the operations of which substantially affect commerce, or whether any provision of section 209 is being violated in any such mine, or whether any such mine is a gassy mine as prescribed in section 203(d), the Director shall cause an inspection of each such mine to be made by a duly authorized representative of the Bureau at least annually. The Director shall also make, or cause duly authorized representatives of the Bureau to make, such special inspections of such mines as may be required by section 203(c) and section 206, and such other inspections of such mines as he deems necessary for the proper administration of this title. " (b)(1) In order to promote sound and effective coordination in Federal and State activities within the field covered by this title, the Director shall cooperate with the official mine inspection or safety agencies of the several States. "(2) Any State desiring to cooperate in making the inspections required under this title may submit, through its official mine inspection or safety agency, a State plan for carrying out the purposes of this subsection. Such State plan shall— " (A) designate such State mine inspection or safety agency as the sole agency responsible for administering the plan throughout the State and contain satisfactory evidence that such agency will have the authority to carry out the plan, " (B) give assurances that such agency has or will employ an adequate and competent staff of inspectors qualified under the laws of such State to make mine inspections within such State, "(C) give assurances, that upon request of the Director or upon request of an operator under section 203 (ej (1), the agency will assign inspectors employed by it to participate in inspections to be made in such State under this title, and " (D) provide that the agency will make such reports to the Director, in such form and containing such information, as the Director may from time to time require.
Coordination with States.
State plan.
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