The material and construction of a sidewalk shall be under the supervision of and subject to the approval of the Board of Officers of the city. Whenever the owner of any lot, lots or parcels of land touching upon the line of this improvement shall desire to build his own sidewalk in conformity with this subchapter, it shall be the duty of the Board of Officers of the city, upon demand of such owner, within 30 days after the mailing of the notice as aforesaid, to see he is furnished with grade stakes and a copy of this subchapter. All such sidewalks as provided for in this subchapter constructed by the owner or owners in front of the lot, lots or parcels of land as hereinbefore provided shall be subject to the approval of the Board of Officers of the city and shall fully conform to the requirements of this subchapter.
('68 Code, § 6.25)