No curb shall hereafter be set, or boulevard constructed, on any of the streets of the village until written permission therefor shall be granted by the Committee on Streets and Alleys; and no such permission shall be granted until satisfactory assurance shall be given to said committee that the necessary materials, as hereinafter provide, will be furnished on the ground before the work is commenced, for curbing across the entire block where curbing is needed or desired and that the boulevard will be promptly and properly filled and graded under the supervision of the Superintendent of Streets.
(Prior Code, § 18-2)