All signs shall comply with the regulations for the erection and construction of signs contained in the Building Code of the Commonwealth of Massachusetts, this chapter and any other applicable state and local regulations. Signs for property located in the Downtown Historic District must be accompanied by a certificate of appropriateness by the Historic District Commission, as regulated by MGL c. 40C ("Historic Districts Act"), and Chapter
131, Historic Districts, of the Code of the City of Melrose prior to applying for a building permit.
Any sign existing at the date of adoption of this chapter but
which does not conform to these regulations by reason of its size,
location, type, lighting, lettering, or illumination shall become
conforming when altered in any way.