23 C.F.R. § 750.152 Application.
Title 23 - Highways
The following standards apply to directional and official signs and notices located within six hundred and sixty (660) feet of the right-of-way of the Interstate and Federal-aid primary systems and to those located beyond six hundred and sixty (660) feet of the right-of-way of such systems, outside of urban areas, visible from the main traveled way of such systems and erected with the purpose of their message being read from such main traveled way. These standards do not apply to directional and official signs erected on the highway right-of-way. [40 FR 21934, May 20, 1975]
Title 23: Highways
PART 750—HIGHWAY BEAUTIFICATION
Subpart B—National Standards for Directional and Official Signs
§ 750.152 Application.

