Save as otherwise provided in these rules or orders issued by the Government, the provisions of the various rules framed by the Government of Kerala. Various departmental manual as applicable, orders and/or instructions applicable to the Departments of Government, orders applicable to the Treasury transactions, provisions of the Kerala Account Code, the Kerala Treasury Code and the Kerala Financial Code, shall, mutatis mutandis, apply to all matters relating to the drawal of Funds, forms of the bills, incurring of the expenditure, maintenance of accounts, rendering of accounts, etc.