The rise of the sports betting market in Brazil has sparked an urgent and multifaceted debate that extends far beyond entertainment, directly impacting sensitive areas such as public health, child protection, and family financial stability.
The social impact and harmful potential of debt accumulation driven by unregulated gambling are pressing issues that legitimately demand the attention of public authorities. Yet, in their haste to provide swift answers to complex issues, public officials frequently flirt with solutions that bypass fundamental constitutional boundaries. Recent moves by the Municipality of Rio de Janeiro through Decree No. 58,274/2026, and by the Municipality of Belo Horizonte, which likewise enacted severe restrictions on these advertisements across its street furniture, perfectly illustrate this tension between the urgency of social protection and the limits of the rule of law that underpins our constitutional framework.
To understand the constitutional bottleneck of these measures adopted in both the Rio de Janeiro and Minas Gerais state capitals, it is useful to recall the historical parallel of São Paulo’s iconic "Lei Cidade Limpa" (Clean City Law - Law No. 14,223/2006). At the time, the São Paulo legislation withstood court challenges due to a crucial technical detail: its rationale was strictly architectural, urbanistic, and environmental. The law did not ban advertising for any specific brand based on its economic sector; instead, it merely restricted physical advertising structures to combat visual pollution and govern urban land use—an authority that constitutionally falls within the powers of municipalities under Article 30, Clause VIII, of the Brazilian Constitution. Conversely, the local administrations of Rio and Belo Horizonte enacted restrictions based strictly on the subject matter (ratione materiae). By banning advertising based on the product being promoted (betting), these municipalities have encroached upon a domain that the Constitution reserves exclusively to the Federal Government, as Article 22, Clause XXIX, categorically establishes that the Federal Union has exclusive jurisdiction to legislate on commercial advertising.
Neither the severity of the issue nor the nobility of the cause can override the rules of legislative jurisdiction that structure the Brazilian Federation. Allowing each of Brazil’s more than 5,500 municipalities to establish its own rules on which economic sectors may or may not advertise would create an intolerable scenario of regulatory chaos, destroying the predictability indispensable to the business environment. The administration of public property or concessions cannot serve as a shortcut to bypass constitutional limitations on jurisdiction.
Beyond the abstract legal flaws, abrupt restrictions imposed by municipal decrees trigger an immediate and highly damaging domino effect on well-established public and private contractual relationships. The ban directly impacts long-term public concession contracts for street furniture —such as bus shelters and digital clocks—, where private concessionaires had priced their operations based on the freedom to commercially exploit these advertising spaces. By suddenly excluding one of the largest and most active advertising sectors in the current market, a drastic economic and financial imbalance is created in these public concessions. The resulting financial damages risk being passed back to the municipal treasury itself through contract rebalancing claims.
In the strictly private sphere, the measure generates extreme uncertainty for advertising agencies, media outlets, and intermediaries who already had scheduled, invoiced, and launched advertising campaigns. The sudden disruption of these revenue streams, driven by a rule of questionable legality, forces companies to bear the burden of renegotiating force majeure, suspension, and termination clauses, leading to high transaction costs and excessive litigation. While seeking solutions to the issues arising from sports betting in Brazil is a collective duty, the fight against this social challenge cannot escape constitutional boundaries.
Furthermore, the practical ineffectiveness of isolated initiatives like those of Rio de Janeiro and Belo Horizonte is evident. Since the decrees only restrict advertising on municipally controlled street furniture, the prohibition covers an extremely narrow segment of the overall advertising activities of the betting sector. Today, betting platforms heavily exploit all possible avenues of advertising, with a dominant presence in the digital environment, social media, national broadcast sports sponsorships, and influencer marketing. By targeting only local physical spaces, the municipal rules prove ineffective in curbing the expansion of the betting market. Rather than producing the beneficial effects that justified their creation, they serve primarily to generate severe economic losses and deep legal uncertainty.
In conclusion, the discussion regarding the imposition of limits on the betting market and its effects on the economy and the mental health of Brazilian families must run on a federal and national level. The need to debate potential excesses of gaming platforms cannot serve as a free pass to subvert constitutional rules of legislative jurisdiction. One thing is certain: facing these issues must respect the principles of the very rule of law it seeks to defend. Otherwise, legitimate public policies risk collapsing in court due to constitutional defects, leaving behind a legacy of legal insecurity, losses to public coffers, breached contracts, and local competitive disadvantage.
