The lawful use of land existing at the time of the passage of the ordinance codified in this chapter, although such use does not conform to the provisions hereof for such land, may be continued, but if such nonconforming use is discontinued for a period of twelve (12) consecutive months, any future use of said land shall be in conformity with the provisions of this title.

(Zoning Ord. § 2-4-101)

The lawful use of a building existing at the time of the passage of the ordinance codified in this chapter may be continued, although such use does not conform with the provisions hereof for such building, and such use may be continued providing no structural alterations, except those required by law or ordinance or permitted under this title are made therein. If no structural alterations are made, a nonconforming use of a building may be changed to another nonconforming use of a building which is for the same or more restricted classification in the opinion of the zoning commission as evidenced by a resolution of record. The foregoing provisions shall also apply to nonconforming uses in districts hereafter changed. Whenever a nonconforming use of a building has been changed to a more restricted use or to a conforming use, such use shall not thereafter be changed to a less restricted use.

(Zoning Ord. § 2-4-102)

Whenever the use of a building becomes nonconforming through a change in the zoning ordinance or district boundaries, such use may be continued and, if no structural alterations are made, it may be changed to another nonconforming use of the same or of a more restricted classification.

(Zoning Ord. § 2-4-103)

In the event a nonconforming use of any building is discontinued for a period of twelve (12) consecutive months, any future use of said building or premises shall be in conformity with the provisions of this title.

(Zoning Ord. § 2-4-104)

No existing building designed, arranged, or intended for or devoted to a use not permitted under the regulations of this title for the district in which such building or premises is located shall be enlarged, extended, reconstructed or structurally altered unless such building and such enlargement, extension, reconstruction and structural alterations, and further use thereof, conform in every respect with the regulations specified by this title for such district in which the building is located; provided, however, nothing herein restricted shall apply to ordinary and necessary repairs.

(Zoning Ord. § 2-4-105)

If, at any time, any building in existence or maintained at the time of the adoption of the ordinance codified in this chapter which does not conform to the regulations for the district in which it is located shall be destroyed by fire, explosion, act of God or act of the public enemy to the extent of seventy-five (75) percent of its value, according to the appraisal thereof by competent appraisers, then and without further action by the town council, the building and the land on which the building was located or maintained shall, from and after the date of such destruction, be subject to all of the regulations specified by this title for the district in which such land and building are located.

(Zoning Ord. § 2-4-106)

Nothing in this chapter shall be interpreted as authorization for or approval of the continuance of the use of a building or premises in violation of zoning regulations in effect at the time of the effective date of the ordinance codified in this chapter.

(Zoning Ord. § 2-4-107)