Answer the question at the end by quoting:

Miranda was born in New York City and raised in the neighborhood of Inwood, the son of Luz Towns, a clinical psychologist, and Luis A. Miranda, Jr., a Democratic Party consultant who advised New York City mayor Ed Koch. Miranda has one older sister, Luz, who is the Chief Financial Officer of the MirRam Group. During childhood and his teens, he spent at least one month each year with his grandparents in Vega Alta, Puerto Rico. He is of mostly Puerto Rican descent.
In 2002, Miranda and John Buffalo Mailer worked with director Thomas Kail to revise In the Heights. Book writer Quiara Alegria Hudes joined the team in 2004. After success off-Broadway, the musical went to Broadway, opening in March 2008. It was nominated for 13 Tony Awards, winning four, including Best Musical and Best Original Score. It also won the 2009 Grammy Award for Best Musical Theater Album. Miranda's performance in the leading role of Usnavi earned him a nomination for the Tony Award for Best Actor in a Musical. Miranda left the cast of the Broadway production on February 15, 2009. Miranda reprised the role when the national tour of In the Heights played in Los Angeles from June 23 to July 25, 2010. He again joined the tour in San Juan, Puerto Rico. Miranda rejoined the Broadway cast as Usnavi from December 25, 2010 until the production closed on January 9, 2011, after 29 previews and 1,185 regular performances. Miranda created other work for the stage during this period. He wrote Spanish language dialogue and worked with Stephen Sondheim to translate into Spanish song lyrics for the 2009 Broadway revival of West Side Story. In 2008, he was invited by composer-lyricist Stephen Schwartz to contribute two new songs to a revised version of Schwartz and Nina Faso's 1978 musical Working, which opened in May 2008 at the Asolo Repertory Theatre in Sarasota, Florida. Miranda also did work for film and television. In 2007, he made a guest appearance on the television series The Sopranos in the episode "Remember When", and in 2009, he played Alvie, Gregory House's roommate in a psychiatric hospital, in the two-hour season six premiere episode of House; he returned to the role in May 2010. He also has done work for Sesame Street, playing occasional roles and singing the theme song to the recurring segment Murray Has a Little Lamb. He was a composer and actor on the 2009 revival of The Electric Company and appeared in the CollegeHumor sketch "Hardly Working: Rap Battle", playing himself working as an intern and rapper. During these years, Miranda also worked as an English teacher at his former high school, wrote for the Manhattan Times as a columnist and restaurant reviewer, and composed music for commercials.

What is Lin-Manuel's relationship to In the Heights?

Answer the question at the end by quoting:

Carr was born Joseph Francis Karr on October 23, 1879, at his parents' home in the Irish neighborhood on the East End of Columbus, Ohio. His father, Michael Karr, was a shoemaker who was born in Ireland in 1841 and immigrated to the United States in 1864. His mother Margaret Karr was born in New York to Irish immigrant parents. Carr had five older siblings, Bridget, James, John, Mary, and Michael, and a younger brother, Edward.
In the early 20th century, college football was the dominant version of the sport, and professional teams would sometimes pay college players to play for them, often under assumed names. The practice was considered questionable ethically, resulting in taint being associated with the professional game. In order to remove the taint, and to engender peaceful relations with the college game, Carr made it one of his first goals as league president to impose a strict ban the use of college football players. Indeed, at the same meeting at which Carr was elected president, the APFA adopted a rule prohibiting teams from using players who had not completed their college course. Carr enforced the ban with vigor. During the 1921 APFA season, two or three college players from Notre Dame played for the Green Bay Acme Packers under assumed names. The incident resulted in the players losing their amateur status and being barred from further college football participation. In January 1922, Carr responded with the severest possible action, kicking the Packers out of the APFA. A few months later, a group headed by future Hall of Famer Curly Lambeau applied for and was granted the Green Bay franchise. The 1925 Chicago Cardinals-Milwaukee Badgers scandal followed four years later. In December 1925, four high school students played for the Milwaukee Badgers in a game against the Chicago Cardinals. Carr responded by imposing stiff penalties. The Milwaukee club was fined $500 and given 90 days within which to "dispose of all its club assets at which time the management must retire from the league." The Cardinals were fined $1,000 for their prior knowledge of the violation, and Cardinal player Art Foltz was temporary banned from the league for live for having "induced the boys to play". The issue arose again when Red Grange, star halfback of the University of Illinois football team, signed with the Chicago Bears. Grange played his final college game on November 21, signed with the Bears the next day, and appeared in his first professional game on November 26. Two weeks later, Ernie Nevers signed a professional football contract for $50,000. To help ease tensions and promote the professional game in the college circles, Carr established a rule prohibiting college players to sign with professional teams until after their class had graduated. These decisions gave the NFL credibility and much needed support from the colleges and universities from across the country.

Who initiated the ban?
the APFA adopted a rule prohibiting teams from using players who had not completed their college course.