(1) Institutions that are located within ten (10) miles of an interchange on the federal-aid interstate system of highways shall be signed on the interstate highway system; provided, that all state community colleges may be signed on the highway system if the colleges are within nineteen (19) miles of an interchange on the highway system. Each institution meeting this criterion shall be signed at only one (1) interchange and shall be signed at the closest location, except where more than two (2) destinations are required to be signed at the same interchange. When this condition occurs, the two (2) closest institutions to the interchange shall be signed, with the remaining institution or institutions being signed at the second closest interchange;
(2) Institutions that are not signed on the federal-aid interstate system of highways shall be signed at the road entering the state highway system nearest the institution; and
(3) All signing shall meet federal highway administration requirements regarding the number of lines of sign legend, sign location and spacing.