The Department is directed to acquire by purchase, gift or condemnation, and shall pay just compensation upon the removal of, the outdoor advertising signs, displays and devices specified in subsections (a), (b) and (c) of this section, when and insofar as their removal is required hereunder, as follows:
(a) Those lawfully in existence on the effective date of this act.
(b) Those lawfully adjacent to any highway made a part of the interstate or primary system on or after the effective date of this act.
(c) Those lawfully erected, which later become unlawful.
(d) Such compensation shall be paid as follows;
(1) For the taking from the owner thereof the outdoor advertising device.
(2) To the owner of the land on which the outdoor advertising device is located for the right to erect and maintain outdoor advertising thereon.
Laws 1968, c. 191, § 9, emerg. eff. April 15, 1968.