Court sets Oct. 2 for trial of Indonesian and Vietnamese defendants.
Security officials use the new order to pressure families to lure defectors home.
All factory and firm employees must have cards by August to receive their salaries.
Authorities are now selecting people only from Pyongyang who have children living in the country to reduce the number of defections.
The leader referenced film taken of markets as an impetus for policy change.
Some welcome the country's advance in military reach, while others voice anxiety over possible defeat in war.
A technological leap by Pyongyang undermines a US bid to rein in its weapons program.
Andrei Lankov says North Korea presents no good options for Washington, Seoul, Tokyo or Beijing.
Many leave early for 'medical' reasons while conscripts from less influential families must serve for years, often in farming or construction.