In cases of (_a_), (_c_), (_d_) and (_e_), the plans and estimates while in course of preparation shall be subject to the examination and control of the Sanitary Engineer. [Sidenote: Submission of detailed plans and estimates to Government through Sanitary Board.] 5. The plans and estimates shall, on completion, be forwarded in duplicate, to the Sanitary Board, together with a full report on the financial aspect of the scheme and the state of public feeling in regard to it, and, if a loan is required, with an application in the prescribed form. In the case of drainage schemes the estimates must be submitted in Sanitary Board’s forms Nos. 21 and 22, copies of which may be obtained from the office of the Sanitary Engineer, and when the scheme has not been prepared in the Board’s Office they shall be accompanied by full details of the calculations of the sizes and strength of the various works, and complete information as to the prices on which the estimates have been framed. The Sanitary Board, after examining the plans, estimates, report and application, shall submit them to the Municipal Department of Government with an expression of their opinion on the merits of the scheme as finally drawn up. CONSTRUCTION. [Sidenote: Conditions as to detailed engineering supervision.] 6. Where the cost of the projected work is estimated to amount to Rs. 10,000 or more an adequate provision for detailed engineering supervision shall be a condition precedent to the grant of sanction by the Government. In the absence of special sanction to the contrary, the local authority shall agree to such one of the following conditions as may be considered suitable in each case:— (_a_) that the work shall be carried out by the Public Works Department if that Department can undertake it: in such cases an extra charge of 15 per cent. on the sanctioned estimates shall be made for supervision, unless the case is one of extraordinary difficulty, under which circumstances a higher charge may be imposed under the orders of Government; or (_b_) that arrangements shall be made with the District Board for the carrying out of the work under the supervision of the District Engineer and his staff; or (_c_) that the work shall be carried out under the supervision of an Engineer qualified for appointment as a District Engineer according to the rules under the Local Self-Government Act of 1885 (Ben. Act III of 1885) specially employed for the purpose; or (_d_) that the work shall be carried out by private engineering firm of established reputation: