Question: What was the name of the boundary created by the piece of legislation that led to the reason for the Pakistan Independence Day?
Context: Independence Day is annually celebrated on 15 August, as a national holiday in India commemorating the nation's independence from the United Kingdom on 1 August 1947, the UK Parliament passed the Indian Independence Act 1947 transferring legislative sovereignty to the Indian Constituent Assembly.  India still retained King George VI as head of state until its transition to full republican constitution.  India attained independence following the Independence Movement noted for largely nonviolent resistance and civil disobedience led by the Indian National Congress (INC).  Independence coincided with the partition of India, in which the British India was divided along religious lines into the Dominions of India and Pakistan; the partition was accompanied by violent riots and mass casualties, and the displacement of nearly 15 million people due to religious violence.  On 14 August 1947, the Prime Minister, Jawaharlal Nehru raised the Indian national flag above the Lahori Gate of the Red Fort in Delhi.  On each subsequent Independence Day, the prime minister customarily raises the flag and gives an address to the nation. The Independence Day of Eritrea is one of the most important public holidays in the country.  It is observed on May 24 every year.  On this day in 1991, Eritrean People's Liberation Front forces moved into the capital Asmara, reinstating independence, following a 30-year-long battle against the Ethiopian military regime.  Eritrea Independence Day is a national holiday, with workers given a day off from work. Jalaluddin (Urdu: جلال الدین , March 3, 1901 – January 21, 1981), aka Jalal Baba (Urdu: جلال بابا), was a politician and supporter of the Pakistan independence movement.  Born in Abbottabad, Hazara, Jalaluddin started his career as a driver for the British, and rose to become a leading transporter.  He joined the All-India Muslim League in 1935 and eventually became President of the Hazara branch of the Muslim League during the 1940s. The Pakistan Civil Awards were established on March 19, 1957, following the proclamation of Pakistan as an independent republic on March 23, 1956.  The announcement of civil awards is generally made once a year on Independence Day, August 14, and their investiture takes place on the following Pakistan Day, March 23.  According to Article 259(2) of the Constitution of Pakistan 1973, along with the Decorations Act 1975, the President of Pakistan confers civil awards on Pakistani citizens in recognition of gallantry.  Awards for Pride of Performance are conferred for outstanding achievements in the fields of art, literature, science, sports and nursing.  The Pride of Performance and the Orders of Bravery ("Shujaat") and Excellence ("Imtiaz") are for Pakistani citizens only, but the remaining awards are open to all for eminence and outstanding services to Pakistan in a significant field of activity. Flag Day (Albanian: "Dita e Flamurit" ) or Independence Day, commonly known as the Albanian Independence day, is celebrated every 28 November as a holiday in Albania, Kosovo and the Albanian diaspora.  It refers to the Albanian Declaration of Independence on 28 November 1912 and the rise of the Albanian flag in Vlora, coinciding with the day in which Scanderbeg raised the same flag in Kruje, on 28 November 1443. Independence Day (Urdu: ‎ ; "Yaum-e Āzādī"), observed annually on 14 August, is a national holiday in Pakistan.  It commemorates the day when Pakistan achieved independence and was declared a sovereign nation following the end of the British Raj in 1947.  Pakistan came into existence as a result of the Pakistan Movement, which aimed for the creation of an independent Muslim state in the north-western regions of South Asia via partition.  The movement was led by the All-India Muslim League under the leadership of Muhammad Ali Jinnah.  The event was brought forth by the Indian Independence Act 1947 under which the British Raj gave independence to the Dominion of Pakistan which comprised West Pakistan (present-day Pakistan) and East Pakistan (now Bangladesh).  In the Islamic calendar, the day of independence coincided with Ramadan 27, the eve of which, being Laylat al-Qadr, is regarded as sacred by Muslims. The Partition of India was the division of British India in 1947 which accompanied the creation of two independent dominions, India and Pakistan.  The Dominion of India is today the Republic of India, and the Dominion of Pakistan is today the Islamic Republic of Pakistan and the People's Republic of Bangladesh.  The "partition" involved the division of two provinces, Bengal and the Punjab, based on district-wise Hindu or Muslim majorities.  The boundary demarcating India and Pakistan became known as the Radcliffe Line.  It also involved the division of the British Indian Army, the Royal Indian Navy, the Indian Civil Service, the railways, and the central treasury, between the two new dominions.  The partition was set forth in the Indian Independence Act 1947 and resulted in the dissolution of the British Raj, as the British government there was called.  The two self-governing countries of Pakistan and India legally came into existence at midnight on 14–15 August 1947. Independence Heights is a community in Houston, Texas, bordered by Crosstimbers to the north, Yale Street to the west, the 610 Loop to the south, and Airline Drive to the east.  The Super Neighborhood boundary created by the City of Houston is bordered by Tidwell to the north, Shepherd Drive to the west, the 610 Loop to the south, and Interstate 45 to the east. Azaadi ; meaning "Independence") is a 2017 Pakistani Action-epic, Romantic Drama Film based on issue of freedom of Jammu and Kashmir.  The Film is written and directed by Imran Malik, and it is produced by Imran's brother Irfan Malik.  The film will be distributed by ARY Films on Pakistan Independence Day, August 14, 2017. Ghulam Murtaza Shah Syed (Sindhi: سائين جي ايم سيد) (17 January 1904 – 25 April 1995), known as G. M. Syed, was a Sindhi political leader known for his scholarly work, spearheading the Pakistan Independence bill in the British Sindh Assembly (which is now Sindh Assembly).  Later founding the Sindhi nationalist movement Jeay Sindh for the freedom of Sindh from the Islamic Republic of Pakistan.
Answer: the Radcliffe Line