Proper noun
PTBT
Initialism of Partial Test Ban Treaty.
Atmospheric nuclear weapon tests almost doubled the concentration of mainC in the Northern Hemisphere. citation The date that the Partial Test Ban Treaty (PTBT) went into effect is marked on the graph. Source: Internet
At a conference on the plan in January 1991, the US indicated it would not permit efforts to achieve a comprehensive ban by consensus with amendments to the PTBT. Source: Internet
Key treaties * Partial Test Ban Treaty (PTBT) 1963: Prohibited all testing of nuclear weapons except underground. Source: Internet
In 1982, a Greenpeace ship docked at Leningrad without permission demanding that the Soviet Union stop testing.sfn The PTBT was a first of a series of nuclear arms control treaties in the second half of 20th century. Source: Internet
In September 1996, the Comprehensive Nuclear-Test-Ban Treaty was signed and superseded the PTBT, though the PTBT is still in effect for states not party to the CTBT. Source: Internet
Parties to the PTBT held an amendment conference that year to discuss a proposal to convert the Treaty into an instrument banning all nuclear-weapon tests. Source: Internet