single individual or corporation, are declared subject to revision, and the Executive is authorised to declare those null and void which seriously prejudice the public interest.
Art. 28. There shall be no private nor governmental monopolies of any kind whatsoever in the United States of Mexico; nor exemption from taxation; nor any prohibition even under cover of protection to industry, excepting only those relating to the coinage of money, to the postal, telegraphic, and radio-telegraphic services, to the issuance of bills by a single banking institution to be controlled by the Federal Government, and to the privileges which for a limited period the law may concede to authors and artists for the reproduction of their work; and lastly, to those granted inventors or improvers of inventions for the exclusive use of their inventions.
The law will accordingly severely punish and the authorities diligently prosecute any accumulating or cornering by one or more persons of necessaries for the purpose of bringing about a rise in price; any act or measure which shall stifle or endeavor to stifle free competition in any production, industry, trade or public service; any agreement or combination of any kind entered into by producers, manufacturers, merchants, common carriers or other public or quasi-public service, to stifle competition and to compel the consumer to pay exorbitant prices; and in general whatever
