Upon completion of plumbing, building or electrical work that has been done under a permit other than an annual permit, the person or firm doing the work shall notify the City Inspector. The City Inspector shall inspect the work within twenty four (24) hours exclusive of Saturdays, Sundays and holidays, or as soon thereafter as practical. If the City Inspector finds the work in conformity with this Code, he shall issue to the person or firm that has done the work a certificate of approval. (1975 Code § 9-2-20)