NASA Technical Standard 8719.14A: Process for Limiting Orbital Debris, December 8, 2011 [Incorporating Change 1, May 25, 2012] [open pdf - 446KB]
"NASA has adopted a policy to control the generation of orbital debris in NASA Procedural Requirements 8715.6A and has implemented this policy in NASA Standard 8719.14A, Change 1. All NASA flight projects are now required to provide debris assessments and end-of-mission planning as a normal part of the project development."
NASA Technical Standard 8719.14A; NASA-STD-8719.14A
NASA Orbital Debris Program Office: http://www.worbitaldebris.jsc.nasa.gov/