(a) The building official shall be responsible for maintaining the numbering system adopted by this article.

(b) The building official shall duly record all numbers assigned under section 82-367.

(c) The building official shall assign to any property owner in the city, upon request and without charge, a property number for each principal building or separate front entrance to such building. However, the building official may issue additional property numbers in accord with the official numbering system whenever a property has been subdivided, a new front entrance opened or undue hardship has been worked on any property owner.