What is a space vehicle launching entity required to do according to the current Government Orbital Debris Mitigation Standard Practices?

根据现行的政府轨道碎片缓减标准做法，航天器发射实体需要做什么？

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Sierra Nevada Space Systems showed video of a successful flight of their Dream Catcher orbital space vehicle this year.

FORBES: Private Space Transportation Reaching New Heights

This appears to be the mindset of the Air Force regarding its experimental X-37B space plane, the billion-dollar robotic vehicle's orbital flight being extended beyond the 270 days it was initially designed for.

ENGADGET: Air Force X-37B space plane books additional time on orbital cruise, orders another margarita