N.Y. Comp. Codes R. & Regs. tit. 17 § 2H.101
Option:
01 Historic Site (NYM9-1, NYM9-2, NYM9-3, NYM9-4) signs (see Sign Drawing SD-G16) may be used along conventional highways and expressways to guide traffic to places of recognized historic value operated and maintained in the public interest.
Support:
02 The NYM9-1 and NYM9-2 signs are for use to provide guidance to sites that are not State-owned or State-operated. The NYM9-3 and NYM9-4 signs are for use for State-owned or State-operated sites.
Standard:
03 Historic Site signs shall only be used for sites listed in the National Register of Historic Places (published by the United States Department of the Interior) or the State Register of Historic Places (published by the New York State Commissioner of Parks, Recreation and Historic Preservation).
04 The lettering for names of places, streets and highways on Historic Site signs shall be composed of a combination of lower-case letters with initial upper-case letters (see Section 2A.13 ).
Option:
05 When the historic site to be signed is classified as a National or State historic district, the NYM9-3 or NYM9-4 sign may be used, with the last line modified to read "HISTORIC DISTRICT."
Guidance:
06 Historic Site signs should only be located at the point at which a motorist must leave a numbered route or major highway in the immediate vicinity of the historic location.
07 Continuity of guidance should be provided. Historic Site signs should not be used unless all subsequent guidance necessary to reach the site is in place.
Support:
08 Usually, motorists wishing to visit an historic site are adequately guided to the general area of the site by following numbered routes or other major highways.
Guidance:
09 Shortened names and/or abbreviations should be employed, where necessary, to enable the historic site name to be placed within the sign.
Option:
10 Where names are too long to fit within the sign constraints, the spacing between the letters in the name may be reduced. Series C lettering may also be used instead of the specified Series D lettering.
Standard:
11 Where used, an Historic Site sign shall be supplemented with an arrow auxiliary sign (see Sections 2D.26 and 2D.28 ) having a white legend and a brown background.
N.Y. Comp. Codes R. & Regs. Tit. 17 § 2H.101