Save as may be otherwise prescribed, it shall be a condition of the payment by the Secretary of State of a grant to the managers of a school or other educational establishment not under the management of an education authority or to other persons providing educational services approved by the Secretary of State that the accounts of the income and expenditure of such managers or persons in respect of such school, educational establishment or service shall be set out according to a form prescribed by the Secretary of State and shall together with the relative vouchers and other documents be submitted for examination to the Secretary of State.