▁developed ▁" its ▁own ▁" Re quire ments ▁on ▁Space ▁Deb ris ▁Mit ig ation ▁for ▁Agency ▁Project s " ▁which ▁" c ame ▁into ▁force ▁on ▁ 1 ▁April ▁ 2 0 0 8 ." ▁Germany ▁and ▁France ▁have ▁posted ▁b onds ▁to ▁saf egu ard ▁the ▁property ▁from ▁de br is ▁damage . ▁The ▁" direct ▁retr ieval " ▁option ▁( option ▁no . ▁ 3 ▁in ▁the ▁US ▁" standard ▁practices " ▁above ) ▁has ▁rarely ▁been ▁done ▁by ▁any ▁space f aring ▁nation ▁( exception , ▁US AF ▁X - 3 7 ) ▁or ▁commercial ▁actor ▁since ▁the ▁earliest ▁days ▁of ▁space fl ight ▁due ▁to ▁the ▁cost ▁and ▁complexity ▁of ▁ach ieving ▁direct ▁retr ieval , ▁but ▁the ▁E SA ▁has ▁scheduled ▁a ▁ 2 0 2 5 ▁demonstr ation ▁mission ▁( Clear space - 1 ) ▁to ▁do ▁this ▁with ▁a ▁single ▁small ▁ ▁der el ict ▁upper ▁stage ▁at ▁a ▁project ed ▁cost ▁of ▁€ 1 2 0 ▁million ▁not ▁including ▁the ▁launch ▁costs . ▁ ▁By ▁ 2 0 0 6 , ▁the ▁Indian ▁Space ▁Research ▁Organ ization ▁( IS RO ) ▁had ▁developed ▁a ▁number ▁of ▁technical ▁means ▁of ▁de br is ▁mit ig ation ▁( upper ▁stage ▁pass iv ation , ▁prop ell ant ▁res erves ▁for ▁movement ▁to ▁gra vey ard ▁or bits , ▁etc .) ▁for ▁IS RO ▁launch ▁vehicles ▁and ▁sat ell ites , ▁and ▁was ▁act ively ▁contrib uting ▁to ▁inter - ag ency ▁de br is ▁coord ination