South Korea, the U.S., Japan and 37 Other Countries Call on Countries to Give 24-Hour Notification of ICBM and SLBM Launches
This seems like common sense to let people know you plan to launch projectile into airspace, but as we have seen recently certain countries could care less:

South Korea, the United States, Japan and 37 other countries issued a joint statement Tuesday calling on countries to provide sufficient advance notification of launches of intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs) and space launch vehicles (SLVs).
The statement came after China carried out a surprise launch of an SLBM into the open waters of the Pacific on July 6, drawing criticism from the U.S. and other countries. The countries did not mention China by name in the statement.
In the statement, the countries called on all nations, particularly nuclear-weapon states, to provide notification of ICBM, SLBM and SLV launches no less than 24 hours in advance, noting that nuclear-capable missile tests without sufficient advance notice are “dangerous” and disrupt the peace of nations close to these tests.
You can read more at the link.

