The Governor is authorized to requisition from the Department of Defense such uniforms, arms and equipment as may be available for use of the Pennsylvania Guard as may be authorized by the Congress of the United States to be made available to the Pennsylvania Guard. In the event uniforms and equipment are not available from the Federal Government for the use of the Pennsylvania Guard, the Governor shall cause to be provided such uniforms, arms and equipment as may be necessary for the efficient functioning and operation of the Pennsylvania Guard.