; and (ii) materials associated with capital expenditures relating to green infrastructure projects, such as rain garden soils; (B) not less than 25 percent of those amounts are used for operations and maintenance of green infrastructure, including any expenses for developing operations and maintenance cost estimates; and (C) not more than 25 percent of those amounts are used for green infrastructure workforce training, except that, in the case of a workforce training program that provides dedicated maintenance labor for green infrastructure, amounts expended for green infrastructure workforce training may be considered to be amounts expended for operations and maintenance under subparagraph (B). (2) Limitation on funding for operations and maintenance Each entity or individual that receives amounts awarded to a Great Lakes State under the Program may use the amounts received by that entity or individual for operations and maintenance of green infrastructure under paragraph (1)(B) for a total period of not more than 3 years. (3) Small businesses (A) In general A Great Lakes State shall ensure that not less than 23 percent of the total amount awarded to the Great Lakes State under the Program is received by small businesses or nonprofit organizations in the Great Lakes State— (i) to construct green infrastructure projects; or (ii) to operate and maintain green infrastructure projects. (B) Permissible activities The requirements under subparagraph (A) may be satisfied— (i) by subgrants made to small businesses or nonprofit organizations by the Great Lakes State; (ii) by contracts entered into by small businesses or nonprofit organizations (or labor unions representing the employees of small businesses or nonprofit organizations) with the Great Lakes State