Appellant Howard brought this suit challenging the validity under the federal constitution and antitrust laws of the Colorado Outdoor Advertising Act, as amended, § 120-5-2 et seq., Colorado Revised Statutes Annotated, 1963 (1971 Supp.). Among other things, Howard asserted the unconstitutionality of the statute under the First Amendment guarantee of free speech, the due process, equal protection and privileges and immunities clauses and
Sections 1 and
2 of the Sherman Act,
15 U.S.C.A. §§ 1 and
2. He alleged that the defendants were threatening him with fine and imprisonment for violation of the statute, by threatening letters, and were attempting to deprive him of his property rights in leases and highway information and directional signs to Pine Lake Trailer Resort and Campground, which he owns and operates. He invoked the provisions of
28 U.S.C.A. § 1343(3) and
42 U.S.C.A. §§ 1983 and
1985(3), and prayed for a declaratory judgment, or an injunction, prohibiting and enjoining defendants from enforcing the allegedly unconstitutional act and for damages.