Upon allowance of the accounts of supervisors and appraisers for unorganized towns and gores, the Commissioner of Finance and Management shall certify forthwith the amount as allowed to the State Treasurer and the balance, if any, of the monies received from any supervisor, after deducting the amount of the county tax and regional planning costs, if any. The amount of such supervisors' and appraisers' accounts, so certified, shall be used for the laying out, construction, and maintenance of highways and bridges in the unorganized towns and gores for which the supervisor is appointed, to be expended by and under the direction of the Secretary of Transportation, in the same manner as State transportation appropriations. The portion of the money which remains unexpended for more than one year may be carried forward in the supervisors' accounts for like purposes. (Amended 1959, No. 328 (Adj. Sess.), § 8(c); 1971, No. 78, § 1, eff. April 16, 1971; 1987, No. 243 (Adj. Sess.), § 29, eff. June 13, 1988; 1993, No. 172 (Adj. Sess.), § 30; 2009, No. 50, § 92.)