All commercial and public structures which are erected or undergo major renovations after the effective date of this section, in the City of Moundsville or within the jurisdiction and authority of the City of Moundsville Fire Department that are required to have a fire alarm system pursuant to West Virginia State Fire Codes and Regulations or the National Fire Prevention Code, and which are not manned by personnel 24 hours a day, 7 days a week shall have an automatic dialer installed in the fire alarm system that automatically calls a supervisory station that is manned by qualified personnel 24 hours a day, 7 days a week that can cause dispatch of emergency personnel. This section shall not have retroactive application to existing structures unless major renovations are made to the structure. Major renovations for the purposes of this section shall be defined as improving the structure where the cost of said improvement (or the aggregate of all improvements in a one year period after commencement of improvement) is greater than 20% of its assessed value for real estate tax purposes in the year the improvement or improvements are commenced. This section shall apply to all commercial and public structures constructed after the effective date of this section. (Ord. 2-19-02.)