Question: Hong Kong Macau cultural exchange was a trip that tested which law who's purpose was to fulfil Article 23 of the Macau Basic Law?

full_context: Document 1: New Youth of Macau: The New Youth of Macau (; Portuguese: "Nova Juventude de Macau" ) is a political party in the Chinese Special Administrative Region of Macau. Macau is a state in which political parties don't play a role. Though some civic groups put forward lists at the elections and might be considered parties. At the last elections in Macau, held on 25 September 2005, the group won 2.45% of the popular vote and 0 out of 12 popular elected seats.
Document 2: Hong Kong 1 July marches: The Hong Kong 1 July protests () is an annual protest rally originally held by the Civil Human Rights Front from the day of handover in 1997 on the HKSAR establishment day. However, it was not until 2003 that the march drew large public attention by opposing the legislation of Basic Law Article 23. The 2003 protest, with 500,000 marchers, was the largest protest seen in Hong Kong since the 1997 handover. Prior to this, only the pro-democracy protest on 21 May 1989 drew more people with 1.5 million marchers in Hong Kong sympathising with the participants of the Tiananmen Square protests of 1989. The introduction of Article 23 legislation leave aside due to the protest. Since then, 1 July marches have been organized every year to demand for democracy, universal suffrage, rights of minorities, protection of freedom of speech, and a variety of other political concerns.
Document 3: Estatuto Orgânico de Macau: The Estatuto Orgânico de Macau (abbreviated EOM; Portuguese for Organic Statute of Macau) was an organic statute that provided for government in Portuguese Macau. Approved on February 17, 1976, the Portuguese legislation reclassified Macau as a "Chinese territory under Portuguese administration" ("território chinês sob administração portuguesa"). On December 20, 1999, the "Estatuto Orgânico" was replaced by the Macau Basic Law, as the territory became a Special Administrative Region of the People's Republic of China.
Document 4: Transfer of sovereignty over Macau: The transfer of sovereignty of Macau from the Portuguese Republic to the People's Republic of China (PRC) occurred on 20 December 1999. Macau was settled and governed by Portuguese merchants in 1535, during the Ming Dynasty (1368–1644 AD). Portugal's involvement in the region was formally recognized by the Qing in 1749. The Portuguese governor, emboldened by the First Opium War and the Treaty of Nanking, attempted to annex the territory, expelling Qing authorities in 1846, but was assassinated. After the Second Opium War, the Portuguese government, along with a British representative, signed the Sino-Portuguese Treaty of Peking that gave Portugal sovereignty over Macau, on the condition that Portugal would cooperate in efforts to end the smuggling of opium.
Document 5: Tourism in Macau: Macau is a special administrative district (SAR) located to the southeast of mainland China. Since Macau is using the “one country two systems” principle just like Hong Kong, acting as a special region of China, therefore it gained many benefits from the principle. The population in Macau is approximately 582,000. Tourism is a major industry in Macau. It is famous for the blend of Portuguese and Chinese cultures and its gambling industry, which includes Casino Lisboa, Macau, Sands Macau, The Venetian Macao, and Wynn Macau. There are many choices of hotels and resorts since it is one of the world class tourism industry in Asia.
Document 6: Visa policy of Hong Kong: The visa policy of Hong Kong deals with the requirements in which a foreign national wishing to enter the Hong Kong Special Administrative Region must meet to obtain an entry permit or visa, which depending on the traveller's nationality, may be required to travel to, enter, and remain in the Hong Kong Special Administrative Region. Visitors from over 145 countries are permitted visa-free entry for periods ranging from 7 to 180 days, to the Hong Kong Special Administrative Region for tourism or certain business-related activities. All visitors must hold a passport valid for more than 1 month.
Document 7: Human rights in Macau: Human rights in Macau refers to the basic rights of citizens of Macau, a former Portuguese colony that reverted to Chinese administration in 1999. As a Special Administrative Region (SAR) of the People's Republic of China (PRC), Macau enjoys a high degree of autonomy, except in defense and foreign affairs, and its citizens have basic freedoms and enjoy legally protected rights. The Macau Basic Law is the SAR's constitution, promulgated by PRC's National People's Congress (NPC) in 1993. The 1987 Sino-Portuguese Joint Declaration and the Basic Law specify that the SAR is to continue to enjoy substantial autonomy and its economic system and way of life are to remain unchanged for the first 50 years under PRC sovereignty. The government is led by a chief executive, chosen by a 300-member election committee, which, in turn, is chosen by a preparatory committee composed of 60 SAR and 40 mainland representatives appointed by the NPC.
Document 8: Macau United Citizens Association: The Macau United Citizens Association (; Portuguese: "Associação dos Cidadãos Unidos de Macau" ) is a political party in the Chinese Special Administrative Region of Macau. Macau is a state in which political parties don't play a role. Though some civic groups put forward lists at the elections and might be considered parties. At the last elections in Macau, 25 September 2005, the group won 16.6% of the popular vote and 2 out of 12 popular elected seats.
Document 9: Hong Kong–Mainland China conflict: Tensions between people from Hong Kong and mainland China have developed since the handover of Hong Kong's sovereignty to China in 1997, and in particular since the late 2000s and early 2010s. Various factors have contributed to the development of such tensions: these include a difference between the popular interpretation in Hong Kong of the "One country, two systems" constitutional principle as against the Chinese government's official interpretation; policies of the Hong Kong and central governments to encourage mainland visitors to Hong Kong; and changing economic environments in Hong Kong and mainland China. Increasingly, these tensions have resulted in a rising sentiment in Hong Kong of hostility to "mainlanders" and resentment at a perceived trend towards assimilation and interference from the mainland and the central government, and at the same time a rising sentiment in mainland China of bewilderment and resentment at assertions that Hong Kong is, and should remain, different from the mainland in terms of political system, culture and language.
Document 10: Macau national security law: The Macau's national security law (, Portuguese: Lei relative à defesa da segurança do Estado) is a law in Macau which prohibits and punishes acts of "treason, secession, and subversion" against the Central government, as well as "preparatory acts" leading to any of the three acts. Taken into effect on 3 March 2009, the purpose of the law is to fulfil Article 23 of the Macau Basic Law, the constitutional document of the Macau Special Administration Region.
Document 11: General Union for the Good of Macau: The General Union for the Good of Macau (; Portuguese: "União Geral para O Bem-querer de Macau" ) is a political party in the Chinese Special Administrative Region of Macau. Macau is a state in which political parties, as such, don't play a role. Instead, some civic groups put forward lists at the elections and might be considered parties. At the last elections in Macau, 25 September 2005, the group won 6.8% of the popular vote and 1 out of 12 popular elected seats.
Document 12: Hong Kong Macau cultural exchange: Hong Kong Macau cultural exchange was a trip that took place on the Sunday morning of March 15, 2009. The goal was to have Pan-democracy camp members test the newly enacted Macau national security law by going from Hong Kong to Macau to see who gets banned.
Document 13: Copyright law of Hong Kong: Copyright law in Hong Kong to a great extent follows the English model. The Basic Law of Hong Kong, its constitutional document, guarantees a high degree of autonomy and continuation of laws previously in force after its reunification with Mainland China. Hong Kong therefore continues to maintain a separate intellectual property regime from Mainland China. Article 139 and 140 of the Basic Law specifically deal with the protection of copyright in Hong Kong.
Document 14: Government of Macau: The Government of the Macau Special Administrative Region of the People's Republic of China (; Portuguese: Governo da R.A.E. de Macau; conventional short name Macau Government, 澳門政府, Governo de Macau), are headed by secretariats or commissioners and report directly to the Chief Executive of Macau. The affairs of the Government are decided by secretaries, who are appointed by the Chief Executive and endorsed by the Central People's Government (CPG) in Beijing. As a special administrative region of the PRC, Macau has a high degree of autonomy, in light of the "One Country, Two Systems" policy. The Macau Government, financially independent from the CPG, oversees the affairs of Macau.
Document 15: Joint Declaration on the Question of Macau: The Joint Declaration on the Question of Macau, or Sino–Portuguese Joint Declaration, was a treaty between Portugal and the People's Republic of China over the status of Macau. The full name of the treaty is Joint Declaration of the Government of the People's Republic of China and the Government of the Portuguese Republic on the question of Macao. Signed in March, 1987 the Declaration established the process and conditions of the transfer of the territory from Portuguese rule to the People's Republic of China. The Joint Declaration served also as the main source of fundamental rights that were implemented in the Macau Special Administrtaive Region Basic Law. The process was similar to the transfer of Hong Kong to Chinese sovereignty by the United Kingdom in 1997.
ground_truth: Macau national security law