; or (2) expand an existing competitive subgrant program that complies with such requirements. (b) Limitation; priority (1) Limitation A State that receives a grant under this Act may not use any of such grant to pay any administrative costs associated with carrying out subsection (a) . (2) Priority In awarding subgrants under this section, a State shall use not less than 15 percent of the grant received under this Act to award such subgrants to eligible entities in rural areas, except that a State may apply to the Secretary for a waiver of the requirement under this paragraph. (c) Subgrant frequency A State may not award more than 1 subgrant under this section to an eligible entity for a fiscal year. (d) Subgrant amount limits A subgrant may not be awarded under this section in an amount greater than— (1) in the case of an eligible entity described in section 10(1)(A) , $25,000; or (2) in the case of an eligible entity described in section 10(1)(B) , $50,000. (e) Use of subgrant (1) In general An eligible entity that receives a subgrant under this section shall use the subgrant for the purposes of— (A) purchasing equipment for use in a digital fabrication laboratory; or (B) providing professional development that relates to the incorporation of the digital fabrication laboratory into curriculum instruction. (2) Limitation An eligible entity that receives a subgrant under this section may not use any of such subgrant to pay any administrative costs associated with carrying out paragraph (1) . (f) Application An eligible entity that desires a subgrant under this section shall, at such time and in such manner as the State that awards the subgrant may require, submit an application to such State that includes— (1) an assurance that the eligible entity will adopt a policy that any digital fabrication laboratory equipped using subgrant funds shall be used predominantly for instructional and educational purposes by students enrolled in one of the eligible entity’s elementary or secondary schools