In
international law, it is said that "treaty interpretation is an art, not a science" Expanding that view, Philip Allott states that "interpretation in International Law is an art and a game and a field of battle." While the drug conventions define clear limitations, and the VCLT serves as a critical interpretive tool, there is "a degree of latitude for policy choices at the national and subnational level" One study examining interpretive latitude in the conventions proposed three categories of deviation by member countries:
permissible policies deviate while being generally accepted,
contested policies are vigorously defended as in fact being within the guidelines, and
impermissible policies are clear breaches of the conventions. Trafficking and possession of cannabis remained illegal; cannabis laws were not enforced for sale of small quantities for on-site use in
coffeeshops. The INCB criticism of the Dutch system has been ongoing. One annual report called it "an activity that might be described as indirect incitement. This is not in accordance with the spirit or the letter of the international drug control treaties." In 2001,
Portugal decriminalized purchase and possession for personal use of all psychoactive drugs. It maintained its treaty obligations by changing the form of prohibition from criminal law to administrative law, replacing criminal penalties with fines, reporting requirements, and treatment referrals; drugs still had to be obtained from illegal sources, as selling remained a criminal act. Initially taking a negative view, the INCB in 2005 accepted the policy as legitimate, finding that "the practice of exempting small quantities of drugs from criminal prosecution is consistent with the international drug control treaties". Some two dozen countries have taken similar approaches to decriminalizing cannabis and other drugs for personal consumption. For instance, in Mexico in 2009, "personal use" quantities were established for a number of drugs – cannabis (5 g), cocaine (0.5 g), heroin (50 mg), methamphetamine (40 mg), LSD (0.015 mg) – possession of which would result in a referral for treatment. A 2023 briefing to the
European Parliament noted: "The UN bodies monitoring compliance with the conventions seem to have come to accept these policy choices" of tolerance or administrative rather than criminal penalties.
Legalization and regulated markets Over 50 countries and the large majority of US states have
legalized cannabis for medical use. In 2012, two US states, Colorado (
Amendment 64) and Washington (
Initiative 502), legalized cannabis by direct vote through
ballot initiatives. The INCB had warned, "Implementing the decisions of popular votes held in the United States in Colorado and Washington to allow for the recreational use of cannabis would be a violation of international laws." In August 2013, the federal government announced it would not act against states opening cannabis stores, with the expectation that state regulations would be "tough in practice, not just on paper, and include strong, state-based enforcement efforts, backed by adequate funding." The UN did not propose sanctions against the US, in particular since there exists no applicable sanction for the UN to apply. In 2013,
Uruguay legalized cannabis, with the law taking effect in April 2014, making it the first country to do so. The INCB condemned the move and stated that Uruguay "knowingly decided to break the universally agreed and internationally endorsed legal provisions". The statement continued: "Cannabis is not only addictive but may also affect some fundamental brain functions, IQ potential, and academic and job performance and impair driving skills. Smoking cannabis is more carcinogenic than smoking tobacco." In "A Framework for the Legalization and Regulation of Cannabis in Canada", it was acknowledged that "Canada is one of more than 185 Parties to three United Nations drug control conventions" and said: "... it is our view that Canada's proposal to legalize cannabis shares the objectives agreed to by member states in multilateral declarations", citing protection of vulnerable citizens, evidence-based policy, and public health, safety and welfare as "the heart of a balanced approach to treaty implementation." The CND and INCB stated, "this decision contravenes the provisions of the drug control conventions, and undermines the international legal drug control framework and respect for the rules-based international order." In Mexico, the
Supreme Court in 2018 overturned as unconstitutional the prohibition of recreational cannabis use and ordered the government to enact corresponding legislation. In 2021, the Mexican
Congress had still failed to change the laws, and the Court
legalized personal use of cannabis. However, without updated legislation, the situation remains murky. Individuals have to apply for a permit and the federal criminal code with respect to recreational use has not been changed. The INCB, in its 2022 "Analysis of the world situation", reported, "In Mexico, legislative and policy changes concerning cannabis use for non-medical purposes continue to be in flux." In 2021,
Malta legalized cannabis, the first EU country to do so. It adopted
a law echoing
article 2(9) of the Single Convention (exemption for the use of drugs for industrial purposes), leading some scholars to consider it the first national legalization to achieve compliance with the drug control treaties.
Impact of the banking sector The US banking industry has created pressure on both domestic and foreign cannabis legalization. While the US has allowed state-level legalization, cannabis remains a federally prohibited drug, keeping the US broadly in compliance with the international drug treaties. Thus, federally regulated banks in the US are reluctant to engage with cannabis-related businesses. In the US, this has largely prevented access to bank accounts, credit card processing, and loans by cannabis businesses operating legally at the state level. The situation is similar in Canada, where all five major national banks have a significant presence in the US. The US
Patriot Act, which prohibits US banks from doing business with distributors of "controlled substances" such as cannabis, adds further complication: after legalization in Uruguay, US banks threatened to sever ties with Uruguayan banks that were dealing with cannabis suppliers.
Reservations by individual countries When joining any of the three drug treaties, a country has the option to make
reservations in order to modify or exclude specific treaty provisions for that country. In joining the 1971 Convention on Psychotropic Substances, the US filed a reservation excepting "
peyote harvested and distributed for use by the
Native American Church in its religious rites"; the American
Drug Enforcement Administration (DEA) made a corresponding exemption to the US
Controlled Substances Act. In January 2012,
Bolivia withdrew from the Single Convention over the indigenous use of the coca leaf. It soon re-applied to the convention with a reservation allowing traditional use of coca; the re-accession came into force in February 2013. Blocking the reservation required objection by 61 countries, one-third of the, at the time, 183 parties to the convention; 15 countries objected by the deadline. The UNODC said it would "continue to work in Bolivia in accordance with its mandates to support the national system of drug control and the country's international cooperation in these matters."
Human rights The drug conventions have been criticized for contributing to violations of the human rights principles enshrined in the
Universal Declaration of Human Rights.
Criminal justice and "harsh" penalties , 35 countries have the death penalty for drug offenses; of those, the 33 UN full member countries are parties to the UN drug conventions. Nine of those countries –
China,
Indonesia,
Iran,
Kuwait,
Malaysia,
North Korea,
Saudi Arabia,
Singapore,
Vietnam – are considered "high application" countries that regularly perform drug crime executions. The conventions encourage criminal penalties but do not provide guidelines for what is appropriate, which can be "an invitation to governments to enact abusive laws and policies, especially in a global context where drugs and drug trafficking are defined as an existential threat to society and the stability of nations". == Modification and reform ==