A certification that the State will support the continuous quality improvement of programs providing preschool services under this title, including support through technical assistance, monitoring, and research. (10) A certification that the State will ensure a highly qualified early childhood workforce to support the requirements of this title. (11) An assurance that the State will meet the requirements of clauses (ii) and (iii) of section 658E(c)(2)(T) of the Child Care and Development Block Grant Act of 1990 ( 42 U.S.C. 9858c(c)(2)(T) ), with respect to funding and assessments under this title. (12) A certification that subgrant and contract amounts provided as described in section 304 will be sufficient to enable eligible providers to meet the requirements of this title, and will provide for increased payment amounts based on the criteria described in clauses (iv) and (v) of paragraph (2)(B). (13) An agreement to provide to the Secretary such periodic reports, providing a detailed accounting of the uses of funding received under this section, as the Secretary may require for the administration of this section. (f) Duration of the plan Each State plan shall remain in effect for a period of not more than 3 years. Amendments to the State plan shall remain in effect for the duration of the plan. 304. Subgrants and contracts for local preschool programs (a) Subgrants and contracts (1) In general A State that receives a payment under section 303(b) for a fiscal year shall use amounts provided through the payment to pay the costs of subgrants to, or contracts with, eligible providers to operate universal, high-quality, free, and inclusive preschool programs (which State-funded programs may be referred to in this section as local preschool programs ) through the State preschool program in accordance with subsection (c). A State shall reduce or increase the amounts provided under such subgrants or contracts if needed to adjust for any overpayment or underpayment described in section 303(b)(4). (2) Amount A State