(c) Eligible locations. Only the following types of establishments shall be eligible for licensing within the zone of control:
- (i) Those legally in existence on January 1, 1967, or those legally in existence along a highway section which is made a part of the interstate or Federal aid primary highway system after that date.
- (ii) Those not visible from the highway.
- (iii) Those located within zoned or unzoned industrial areas.