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?

Context paragraphs:
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.

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.

Group of 89: The Group of 89 was a conservative political pressure group formed by the conservative business and professional elites led by tycoon Vincent Lo in the Hong Kong Basic Law Consultative Committee (BLCC) and Hong Kong Basic Law Drafting Committee (BLDC) during the drafting period of the Hong Kong Basic Law in the late 1980s.  Compared to the Group of 190 set up by the pro-democracy groups, it was on the conservative side of debates over the constitutional reform, the Hong Kong Basic Law and the future of Hong Kong.

Taxation in Hong Kong: Under Article 108 of the Basic Law of Hong Kong, the taxation system in Hong Kong is independent of, and different from, the taxation system in mainland China.  In addition, under Article 106 of the Hong Kong Basic Law, Hong Kong enjoys independent public finance, and no tax revenue is handed over to the Central Government in China.  The taxation system in Hong Kong is generally considered to be simple, transparent and straightforward among jurisdictions in the world.  Taxes are collected through the Inland Revenue Department (IRD).

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.

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.

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.

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.

Hong Kong Basic Law Drafting Committee: The Hong Kong Special Administrative Region Basic Law Drafting Committee (BLDC) was formed in June 1985 for the drafts of the Hong Kong Basic Law for the Hong Kong Special Administrative Region (HKSAR) after 1997.  It was formed as a working group under the National People's Congress.  The Drafting Committee had 59 members, of whom 23 were from Hong Kong and 36 were from Mainland, mostly the PRC government officials.  The Drafting Committee was dominated by Hong Kong businessmen with a share from different social sectors.  The decisions of the Drafting Committee on the political structure and legal system of the HKSAR had a great impact on the politics of Hong Kong today.

Copyright (Amendment) Bill 2014: Copyright (Amendment) Bill 2014 (also dubbed Internet Article 23 (網絡23條) ) broadly refers to a set of proposed ordinances regulating the internet in Hong Kong.  Under debate is the legality of derivative works popular on the internet, including doujin drawings, kuso, parodies, and the modification and adaptation of the lyrics in Hong Kong.  Because of the upsurge of derivative work, the Hong Kong Government has amended related legislations in order to regulate the Internet, as well as legislation extending coverage to the existing network of Internet users.  The name "Internet Article 23" comes from the controversial Hong Kong Basic Law Article 23 on national security that detractors say would curb personal freedoms.

Supporting paragraphs: Hong Kong Macau cultural exchange Macau national security law
Answer: Macau national security law