No such building which is nonconforming with respect to height, area or lot location or setback from any lot line shall be enlarged or altered in such manner as to increase any nonconformity subject to the provisions of § 320-41 of this chapter.

No such building which is nonconforming with respect to use shall be enlarged nor shall it be altered structurally except as may be allowed by law or ordinance.

No such nonconforming use shall be enlarged or extended, nor shall it be changed to another nonconforming use.

No such nonconforming building or use if changed to a building or use which conforms with the provisions of this chapter shall thereafter be changed to a nonconforming use or building.

No such nonconforming use if discontinued for six months or longer shall be resumed.

No such nonconforming building if 50% or more of assessed value thereof is deliberately destroyed due to any cause shall be restored in nonconforming form or location or for the continuance of a nonconforming use, except that if such a building is destroyed due to fire, explosion or other causes, it may, if permitted by the Board of Zoning Appeals, be restored in substantially the same form and location but without enlargement for a conforming use or the continuance, and without extension of the nonconforming use.

In the case of a lot on which there stands, on the effective date of this chapter, a dwelling or other principal building which conforms with the Building Zone Ordinance in effect immediately prior to that date, which lot shall not at any time on or after the effective date hereof have been reduced in area or in any dimension, the fact that the area of such lot is less than that prescribed in § 320-6 of this chapter or that the length of front lot line frontage of said lot is less than that prescribed in § 320-6 of this chapter, shall not prevent the erection, enlargement, alteration or maintenance on such lot of a building or buildings which, as so erected, enlarged or altered, comply with all the other provisions of this chapter.

In the case of an unimproved lot in separate ownership on the effective date of this chapter, or in the case of lots approved by the Planning Board prior to the effective date of this chapter, which lot or lots conform with the Building Zone Ordinance in effect immediately prior to that date, which lot or lots shall not at any time on or after the effective date hereof be reduced in area or in any dimension, the fact that the length of front lot line frontage of said lot or lots is less than that prescribed in § 320-6 of this chapter shall not prevent the erection or maintenance on such lot of a building or buildings which, as so erected, comply with all the other provisions of this chapter.

No improved lot shall be reduced in area or in any dimension unless the lot so reduced has at least the area prescribed in § 320-6 of this chapter and has the unoccupied spaces required by the other provisions of this chapter.

No improved lot shall be reduced in length of front lot line frontage unless the lot as so reduced has at least the length of front lot line frontage prescribed in § 320-6 of this chapter.

No improved lot shall be reduced in area or in any dimension unless the setback of each then existing building from any new boundary line shall be at least the setback which would be required by the other provisions of this chapter for a building of the same kind then newly erected in the same location.

No fence, including a wall or structure in the nature of a fence, piers and gates, which exceeds 6 1/2 feet in height, such height to be measured from original grade at the structure, shall be hereafter erected or maintained on any premises. No barbed wire or similar fence is permitted. Any fence, including a wall or structure in the nature of a fence, piers and gates located on private premises but abutting a Village street, a street appearing on the Official Map of the Village or a private street, must be located entirely on the fence owner's private property and at least three feet from the closest paved edge of that street.

On a corner lot, no fence, including a wall or structure in the nature of a fence, piers and gates, more than three feet in height shall be erected, placed or maintained within the triangular area formed by the intersecting street lines and a straight line joining said street lines at points which are 30 feet distant from the point of intersection, measured along said street lines. The height of three feet shall be measured above the street surface at the nearest edge of street.