question: Betacetylmethadol is a substance regulated by what act signed into law by President Richard Nixon? 
answer: Controlled Substances Act
context: Title: Controlled Substances Act
  Passage: The Controlled Substances Act (CSA) is the statute establishing federal U.S. drug policy under which the manufacture, importation, possession, use and distribution of certain substances is regulated.  It was passed by the 91st United States Congress as Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970 and signed into law by President Richard Nixon.  The Act also served as the national implementing legislation for the Single Convention on Narcotic Drugs.
  Title: United States vice presidential selection, 1973
  Passage: In 1973, Republican Vice President Spiro Agnew was forced to resign following a controversy over his personal taxes.  Under the terms of the 25th Amendment, a vice presidential vacancy is filled when the president nominates a candidate who is confirmed by both houses of Congress.  Republican President Richard Nixon thus had the task of selecting a vice president who could receive the majority support of both houses of Congress.  Nixon considered selecting former Texas Governor John Connally, New York Governor Nelson Rockefeller, and California Governor Ronald Reagan.  However, Nixon settled on House Minority Leader Gerald Ford of Michigan, who was popular among the members of Congress and who was good friends with Nixon.  Ford won the approval of both houses by huge margins, and was sworn in as the 40th Vice President of the United States on December 6, 1973.  In 1974, Ford ascended to the presidency after the Watergate scandal led to the resignation of President Nixon.
  Title: Zilch memo
  Passage: A memorandum known as the Zilch memo was an American government document sent by National Security Advisor Henry Kissinger to President Richard Nixon on January 3, 1972, about the military situation in Laos during the Vietnam War.  On the memo, in his own handwriting, Nixon described the decade-long bombing campaign by the United States in Southeast Asia as a "failure," having achieved "zilch," despite public comments to the contrary.  Just the day before, January 2, Nixon told CBS News reporter Dan Rather in an interview that the bombing was "very, very effective."  Previously missing from the Richard Nixon Library, the memo was discovered in the possession of Alexander Butterfield, who served as the Deputy Assistant to President Nixon from 1969 to 1973, by "Washington Post" reporter Bob Woodward, who subsequently published it in his 2015 book "The Last of the President's Men".
  Title: Betacetylmethadol
  Passage: Betacetylmethadol is a synthetic opioid.  It is a diastereoisomer of alphacetylmethadol (as well as levacetylmethadol).  In the United States, betacetylmethadol is a Schedule I drug Narcotic under the Controlled Substances Act, with an ACSCN of 9607 and a 2 gramme manufacturing quota as of 2014.
  Title: Marine Mammal Protection Act
  Passage: The Marine Mammal Protection Act (MMPA) was the first act of the United States Congress to call specifically for an ecosystem approach to wildlife management.  It was signed into law on October 21, 1972 by President Richard Nixon and took effect 60 days later on December 21, 1972.  MMPA prohibits the "taking" of marine mammals, and enacts a moratorium on the import, export, and sale of any marine mammal, along with any marine mammal part or product within the United States.  The Act defines "take" as "the act of hunting, killing, capture, and/or harassment of any marine mammal; or, the attempt at such."  The MMPA defines harassment as "any act of pursuit, torment or annoyance which has the potential to either: a. injure a marine mammal in the wild, or b. disturb a marine mammal by causing disruption of behavioral patterns, which includes, but is not limited to, migration, breathing, nursing, breeding, feeding, or sheltering."  The MMPA provides for enforcement of its prohibitions, and for the issuance of regulations to implement its legislative goals.
citations: Controlled Substances Act Betacetylmethadol