In the event any poles, structures, or improvements are to be located and installed in or upon any public street in the city or relocated for the convenience or necessity of the person maintaining them, the person desiring to construct, erect, install, or relocate such poles, structures, or improvements shall first submit to the director a sketch or blueprint of the plan of such construction or relocation for approval. The director shall immediately inspect the sketch or blueprint of the plan and, if satisfactory, the director shall approve the plan. Until such approval is given, no work may be done in that connection. If the plan of construction or relocation does not meet with the director’s approval, the director shall return the plan to the person submitting it with any objections. The construction or relocation of all structures, improvements, and poles must be subject to the supervision of the director. (Code 1941, Art. 145-4; Ord. Nos. 22026; 24495)